Technical Manual U.S. Edition, December, 2012
Design support department Telephone hotline and technical project processing Telephone: 855 572 4625 info@schock-us.com www.schock-us.com
Schöck Isokorb®
Design and advisory services The Schöck Engineers in our design department are available to answer your questions concerning structural design, construction and building physics. Our services include structural design proposals and drawings. Please see chapter “Structural Design” for further information on available services. Submit your documents ,including plan views, sections, load information, and site address to info@schock-us.com
— Schöck Design Department Telephone hotline and technical project processing Tel: 855 572 4625 E-Mail: info@schock-us.com
— Lunch&Learn seminars — Phone: 855 572 4625 Internet: www.schock-us.com E-Mail: marketing@schock-us.com
Schöck USA, Inc. 500 Fifth Avenue, #4810 New York, NY 10110
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Schöck Isokorb® Table of Contents
Page
Introduction to Schöck Isokorb®
4-6
Schöck Isokorb® Structural Thermal Break
7 - 52
Thermal Insulation Product Description and Applications S-line Load-bearing Behavior S-Line Product Description and Applications C-line Load-bearing Behavior C-line Installation Guidelines C-line
7 - 12 13 - 20 21 - 26 27 - 26 37 - 46 47 - 52
Schöck Isokorb® Products
53 - 130
Schöck Isokorb® Type Summary Notes for Use and Structural Design Schöck Isokorb® S-line (steel beams) Schöck Isokorb® C-line (concrete slabs) Schöck Isokorb® Products for Further Applications
54 - 55 56 57 - 68 69 - 128 129 - 130
Schöck Isokorb® Structural Design Structural Design Notes Structural Design Example S-line End plate Designing S-line Structural Design Example C-line
Schöck Isokorb® Installation instructions Schöck Isokorb® S-line Installation Instructions Schöck Isokorb® C-line Installation Instructions
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131 - 145 133 134 - 138 139 140 - 145
147 - 155 148 - 150 151 - 155
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Schöck Isokorb® Introduction Product lines
Schöck Isokorb® product lines Schöck Isokorb® S-line The S-line facilitates the thermal separation of steel structures while transferring high loads at the same time.
Schöck Isokorb® C-line The C-line facilitates the thermal separation of reinforced concrete structures while transferring high loads at the same time.
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Contents
Schöck Isokorb® Introduction Schöck Isokorb® type summary Schöck Isokorb® S-line (steel beams)
Page
Free cantilevered steel structures Type S22
Product Structural design
57 134
S22
Schöck Isokorb® C-line (concrete slabs)
Page
Free cantilevered balconies Type CM
Product Structural design
69 140
CM Type CMD
for "run-through slabs" Product
83
Product
97
Product
109
Product
121
CMD
Supported balconies Type CV
CV Type CVB
for punctual load peaks
CVB
Cantilevered balconies with seismic loads Type CEQ
(use of CEQ only in interaction with the basic types) CEQ
Products for further applications
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Schöck Isokorb® Introduction Notes
Design values The design values and recommendations provided in this technical manual represent the best of our knowledge at the time of publication. They are based on international certifications and compliance to US Standards as well as on the results of extensive research and testing. They are intended to provide the planner and the designing engineer with a better understanding of Schöck Isokorb®. Neither Schöck USA Inc. nor Schöck Bauteile GmbH, the manufacturer of the Isokorb, take any responsibility for improper selection of materials, handling or installation of the Schöck Isokorb®. The information contained in this technical manual is for information purposes only and may not be relied upon for any purpose. It cannot replace commonly accepted engineering rules and regulations.
Evaluations and Certifications Schöck Isokorb® C-line Construction with Schöck Isokorb® C-line provided in this technical manual has been evaluated in accordance with the ACI 318-11 Building Code Requirements for Structural Concrete.
Schöck Isokorb® S-line The design capacities of the Schöck Isokorb® type S22 have been independently checked and approved as compliant with ANSI/ AISC 360-10 Specification for Structural Steel Buildings.
Certification of Schöck Isokorb® Schöck Isokorb® has certification in different countries such as France (CSTB), Germany (DIBt) and the UK (BBA).
Units Technical data is provided in both fractional (Imperial) and metric units. Metric values are provided using the International System of units (SI). As Schöck Isokorb® is a metric product, data is provided in SI units with conversions to Imperial engineering units (inches, pounds, and so forth) given in parentheses.
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Schöck Isokorb® Structural Thermal Break Schöck Isokorb® Products Structural Thermal Break
Schöck Isokorb® Structural Design Schöck Isokorb® Installation
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Thermal Insulation Thermal efficiency
Structural Thermal Break
Minimizing our use of energy and natural resources are vital components of the global strategy to protect our environment and mitigate climate change. Buildings and the construction sector represent a large portion of total global energy and resource consumption. The USA has responded to this awareness with a tightening of building energy and performance standards. ASHRAE 90.1 has significantly reduced the energy that can be consumed by a building. In the USA a large percentage of the energy consumed in buildings is space heating. Therefore, improving the building envelope using innovative construction methods and products is an efficient way to save on operational energy and improve building durability. Standard improvement strategies include reducing the window to wall ratio, using high-performance window systems and improving facade insulation by reducing thermal bridging. Uncontrolled thermal bridging, such as balcony slabs running through the building envelope, results in high values of energy loss and the potential for premature structural damage. The impact of thermal bridging increases proportionally with the overall thermal performance of the building envelope when the sources of the bridging and the associated temperature differential are not adequately addressed.
What is a thermal bridge? Thermal bridges are localized assemblies within the building envelope where high levels of heat loss occur and result in low internal surface temperatures, which create conditions for condensation and mold growth. Typical thermal bridging assemblies include uninsulated balcony slabs or steel beams penetrating the building envelope, conductive window frames, and gaps in the continuity of insulation. In the case of uninsulated balcony slab connections, the interaction of the geometrical thermal bridge (cooling fin effect of the balcony slab) and the material-related thermal bridge (high heat conductivity of a reinforced concrete slab) results in a great deal of heat loss, meaning that the uninsulated balcony connection is one of the most critical thermal bridges in the building envelope.
Impact of thermal bridges In the area surrounding the thermal bridge, the additional local heat loss leads to a reduction in the internal surface temperatures. If the surface temperature drops below the dew point temperature, moisture in the air will condense on the cold surfaces. As soon as the surface temperature drops below the so-called mold temperature there is a risk of mold spores entering the room air. Mold has very serious health impacts and can trigger asthma and cause strong allergic reactions. The low surface temperatures also lead to unnecessary thermal discomfort due to radiant heat loss.
Summary of the effects of thermal bridge: — — — —
Risk of mold and dew formation Risk of effect on health (allergies etc.) Additional heating energy loss Discomfort 11 10 9 8 7 6 5 4
Increased risk of mold with uninsulated balconies
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Thermal Insulation Thermal bridging
The Schöck Isokorb® Solution for Steel constructions
thermal insulation 80 mm [3 1/8"] k = 0.04 W/(m K) [0.023 Btu/(hr ft F)]
-18°C (0°F)
21°C (70°F)
Structural Thermal Break
For steel constructions, we offer Schöck Isokorb® Type S221). The Isokorb® Type S22 is reinforced with stainless steel (k = 15 W/ (mK)) which is encompassed with high quality insulating material (k = 0.031 W/(mK)). The following diagrams shows the difference between a continuous steel beam (k = 50 W/(mK)) throught the insulation layer and thermal break with the Schöck Isokorb® Type S22.
Temperature °F 70°F
steel member W14×26 k = 50 W/(m K) [28.78 Btu/(hr ft F)]
50°F
14"
32°F
14°F
4.1°C (39.4°F)
80 mm [3 1/8"]
0°F
Temperature °C (Temperature °F)
Illustration of a conventional building structure without thermal insulation of the balcony structure, with typical building component characteristics.
thermal insulation 80 mm [3 1/8"] k = 0.04 W/(m K) [0.023 Btu/(hr ft F)]
-18°C (0°F)
21°C (70°F)
Temperature °F 70°F
steel member W14×26 k = 50 W/(m K) [28.78 Btu/(hr ft F)]
50°F
14"
32°F
14°F
Schöck Isokorb®
14.9°C (58.8°F)
80 mm [3 1/8"]
Temperature °C (Temperature °F)
0°F
Illustration of a balcony structure with thermal insulation provided by the Schöck Isokorb®, with typical building component characteristics.
The diagrams above illustrate the difference between a conventional construction method and thermal insulation using Schöck Isokorb®. In a conventional building structure the heat can freely flow out of the interior , which causes low surface temperatures θmin. Schöck Isokorb® can minimize the loss of thermal energy, and prevents damp walls and associated structural damage.
1)
The use of Type S22 applications are shown on page 14. The reference plane for the analysis is 180 mm [7"] (width) to 353 mm [14"] (height)
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Thermal Insulation Thermal bridging
Thermal protection with Schöck Isokorb® Schöck Isokorb® Type CM makes it possible to thermally insulate the balcony detail at the insulated wall by replacing the continuous reinforced concrete with a thermally insulated connection using the Schöck Isokorb® component.
The Schöck Isokorb® solution for concrete construction Reinforcing steel (k = 50 W/(mK)) is replaced with stainless steel (k = 15 W/(mK)), and the concrete (k = 1.6 W/(mK)) is replaced with insulating material (k = 0.031 W/(mK)). This reduces heat conductivity in the connection area by approximately 90%, and minimizes the heat loss via the balcony by about 80%. The thermal insulation provided by the Schöck Isokorb® increases the surface temperature in the living area by more than 62.6°F (17°C) (minimum surface temperature Өmin is explained on the next page), depending on the nature of the structure, see the illustration below. The risk of mold formation is also minimized, and the insulated building envelope is effectively made continuous.
100 mm [4"] k = 0.7 W/(m K) [0.40Btu/(hr ft F)]
80 mm [3 1/8"] k = 0.033 W/(m K) [0.0190 Btu/(hr ft F)]
50 mm [2"] k = 0.025 W/(m K) [0.0144 Btu/(hr ft F)]
0°F (-18°C)
70°F (21°C)
Temperature °F 70°F
13 mm [1/2"] k = 0.58 W/(m K) [0.334 Btu/(hr ft F)] 200 mm [7 7/8"]
50°F
32°F
k = 221 W/(m K) [127.21 Btu/(hr ft F)]
k = 2.2 W/(m K) [1.27 Btu/(hr ft F)] 346 mm [1'-1 5/8"]
14°F
Өmin= 52.5°F (11.4°C)
25 mm [1"] k = 0.025 W/(m K) [0.0144 Btu/(hr ft F)]
0°F
Temperature °F (Temperature °C)
Illustration of a conventional building structure without thermal insulation of the balcony structure, with typical building component characteristics.
100 mm [4"] k = 0.7 W/(m K) [0.40Btu/(hr ft F)]
80 mm [3 1/8"] k = 0.033 W/(m K) [0.0190 Btu/(hr ft F)]
50 mm [2"] k = 0.025 W/(m K) [0.0144 Btu/(hr ft F)]
0°F (-18°C)
70°F (21°C)
Temperature °F 70°F
13 mm [1/2"] k = 0.58 W/(m K) [0.334 Btu/(hr ft F)] 200 mm [7 7/8"]
50°F
32°F
k = 221 W/(m K) [127.21 Btu/(hr ft F)]
Schöck Isokorb® k = 0.19 W/(m K) [0.110 Btu/(hr ft F)] 346 mm [1'-1 5/8"]
25 mm [1"] k = 0.025 W/(m K) [0.0144 Btu/(hr ft F)]
14°F
Өmin= 63.7°F (17.6°C) 0°F
Temperature °F (Temperature °C)
Illustration of a balcony structure with thermal insulation provided by Schöck Isokorb® Type CM, with typical building component characteristics.
The diagrams above illustrate the influence of an Isokorb® in a concrete structure. With a non-insulated balcony slab, the heat can flow out freely, yet with Schöck Isokorb® heat loss will be reduced and the inside surface temperature will be increased.
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Thermal Insulation
Key thermal values for the products Equivalent thermal conductivity keq The equivalent thermal conductivity keq is the average overall thermal conductivity of the Schöck Isokorb® insulating element for the different surface proportions. If the insulating elements are of the same thickness, it is a measure of the thermal insulation effect of the connection. The smaller keq is, the greater the thermal insulation of the balcony connection. Since the equivalent thermal conductivity of the surface proportions of the materials that are used is taken into consideration, keq is dependent upon the load capacity of the Schöck Isokorb®.
Thermal transmission resistance R and Req The R-value is a measure of heat conduction through a certain layer of a given thickness. It is dependent on the thermal conductivity k and the layer thickness of a material. With multi-layer components, the R-value for the entire component results from the sum total of all R-values. The greater the R-value, the better the thermal insulating characteristic. The equivalent thermal transmission resistance Req describes the thermal conductivity k through the Schöck Isokorb® and can be expressed as: R=
Req =
d k dIsokorb k eq
Component thickness Thermal conductivity
=
=
80 mm [3 1/8 '] thickness of the Isokorb equivalent thermal conductivity of the Isokorb
Keep in mind, the Req-value does not include the surface air film.
The minimum surface temperature Өmin The lowest surface temperature that occurs in the vicinity of a wall section determines the potential formation of condensation or mold. The minimum surface temperature therefore dictates the effects of a thermal bridge with regard to moisture effects.
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Thermal Insulation
Key thermal values for the products keq-value Isokorb® height H Isokorb® type
Structural Thermal Break
CM10 CM20 CM30 CM40
180 mm [7'']
units
220 mm [8 5/8'']
200 mm [7 7/8'']
250 mm [9 7/8'']
R02)
R1202)
R02)
R1202)
R02)
R1202)
R02)
R1202)
W/mK
0.157
0.176
0.145
0.161
0.135
0.150
0.123
0.136
[Btu/(h*°F*ft)]
[0.091]
[0.101]
[0.084]
[0.093]
[0.078]
[0.087]
[0.071]
[0.079]
W/mK
0.185
0.203
0.170
0.186
0.157
0.172
0.142
0.156
[Btu/(h*°F*ft)]
[0.107]
[0.117]
[0.098]
[0.107]
[0.091]
[0.099]
[0.082]
[0.090]
W/mK
0.212
0.230
0.194
0.210
0.179
0.194
0.162
0.175
[Btu/(h*°F*ft)]
[0.122]
[0.133]
[0.112]
[0.122]
[0.104]
[0.112]
[0.094]
[0.101]
0.202
0.217
0.182
0.195
[0.117]
[0.125]
[0.105]
[0.113]
W/mK
0.239
0.257
0.218
0.235
[Btu/(h*°F*ft)]
[0.138]
[0.149]
[0.126]
[0.136]
keq-value 3.dim1) Isokorb® height H
Isokorb® type 2 x S22 continuous steel beam
units
80 mm [3 1/8'']
W/mK
0.610
[Btu/(h*°F*ft)]
[0.353]
W/mK
4.120
[Btu/(h*°F*ft)]
[2.381] Req-value Isokorb® height H
Isokorb® type
CM10 CM20 CM30 CM40
180 mm [7'']
units
200 mm [7 7/8'']
220 mm [8 5/8'']
250 mm [9 7/8'']
R0
R120
R0
R120
R0
R120
R0
R120
m²K/W
0.508
0.456
0.552
0.496
0.593
0.534
0.651
0.589
[(ft²*°F*h)/Btu]
[2.887]
[2.588]
[3.132]
[2.815]
[3.366]
[3.032]
[3.698]
[3.342]
m²K/W
0.433
0.395
0.472
0.430
0.509
0.465
0.562
0.514
[(ft²*°F*h)/Btu]
[2.461]
[2.241]
[2.680]
[2.444]
[2.890]
[2.640]
[3.190]
[2.922]
m²K/W
0.378
0.348
0.412
0.380
0.446
0.412
0.494
0.457
[(ft²*°F*h)/Btu]
[2.145]
[1.976]
[2.342]
[2.160]
[2.532]
[2.338]
[2.804]
[2.595]
m²K/W
0.335
0.311
0.366
0.341
0.397
0.369
0.441
0.411
[(ft²*°F*h)/Btu]
[1.901]
[1.767]
[2.080]
[1.935]
[2.252]
[2.098]
[2.502]
[2.334]
Req-value 3.dim1) Isokorb® type 2 x S22 continuous steel beam 1) 2)
Isokorb® height H units
80 mm [3 1/8'']
W/mK
1.310
[Btu/(h*°F*ft)]
[0.757]
W/mK
0.190
[Btu/(h*°F*ft)]
[0.110]
The use of Type S22 applications are shown on page 14. The reference plane for the analysis is 180 mm [7"] (width) to 353 mm [14"] (height) fire protection class, see page 33
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Structural Thermal Break
Product Description and Applications S-line
Contents
Page
Building with Schöck Isokorb® S-line
14
Placement Details for the Schöck Isokorb® S-line
15
Design and materials for Schöck Isokorb® S-line
16 - 18
Schöck Isokorb® S-line anti-corrosion protection/ fire protection
18
Steel construction with the Schöck Isokorb® S-line
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Product Description and Applications S-line Building with Schöck Isokorb® S-line
Structural Thermal Break
Typical applications for Schöck Isokorb® S22 are cantilevered steel constructions such as canopies in institutional buildings. Furthermore the Schöck Isokorb S22 is suitable for various applications such as steel balconies, roof extensions, steel columns etc. in institutional as well as residential buildings.
Placement details for Schöck Isokorb® This sample detail illustrate the incorporation of Schöck Isokorb® S22 at a typical canopy. Schöck Isokorb S22 modules are located at the wall section between the exterior and interior wall providing a continuos insulation layer. The product separates the exterior structure thermally from the interior structure.
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Product Description and Applications S-line Placement details for the Schöck Isokorb® S-line vapor permeable air barrier
composite concrete on steel deck
rigid insulation
Structural Thermal Break
Schöck Isokorb® type S22 (×2)
steel canopy
welded end plate matal panel cladding system
structural column building sheathing
Sample detail at a typical steel canopy for reference purposes
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Product Description and Applications S-line Design and materials for Schöck Isokorb® S-line
Identification sticker Nut
Structural Thermal Break
Washer
End plate Schöck Isokorb® module with PTFE plate
Threaded rod M 22 (22mm)
Insulating material Neopor (EPS expanded polystyrene)
Naming of Schöck Isokorb® type S22 components
Schöck Isokorb® is a structural thermal break element and mainly works as follows: 1. The insulating element thermally separates the balcony and canopy structure from the interior slab or structure and therefore reduces thermal bridging. 2. Schöck Isokorb® transfers loads from the external supporting structure to the interior supporting structure.
Schöck Isokorb® type S22: Internal view
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Product Description and Applications S-line Design and materials for Schöck Isokorb® S-line Comparable Steel Materials Material used in the fabrication of Schöck Isokorb S-line modules conform to ANSI/AISC 360-10 standards for structural steel. The table below shows the mechanical properties and chemical composition of the materials used in the Schöck Isokorb® along with a comparable structural steel per the US specifications.
Structural Thermal Break
The Engineer of Record (EOR) should verify this and employ sound engineering judgement when specifying Schöck Isokorb® for use under jurisdiction of the US specifiations.
Materials for Schöck Isokorb® Materials for Schöck Isokorb®
Material
Comparable to
Stainless Steel
Mo-Cr-Ni-austenitic stainless steel compliant with German Standard grades 1.4401, 1.4404 and 1.4571 (Choice of Grade at Manufacturer’s Discretion).
Threaded rods M22 db = 22 mm [7/8"]
S460 (German Standard) Nominal Tensile Strength Tult := 600 MPa Minimum Yield Stress Ty := 390 MPa Nominal Shear Stress Fnv := 300 MPa
ASTM A307 Grade A Fu Tensile Stress = 60 ksi
Rectangular hollow profile w/h/d = 50 mm [1 15/16"] / 50 mm [1 15/16"] / 3 mm [1/8]
S 355 (German Standard) Nominal Tensile Strength Tult := 510 MPa Minimum Yield Stress Ty := 355 MPa
ASTM A500 Grade B Fu Tensile Stress = 58 ksi Fy Minimum Yield Stress = 46 ksi
Type S22 End Plate
S 275 (German Standard) Nominal Tensile Strength Tult := 430 MPa Minimum Yield Stress Ty := 275 MPa
ASTM A36 Fu Tensile Stress = 58-80 ksi Fy Minimum Yield Stress = 36 ksi
Insulation material
Polystyrene hard foam (Neopor®) k = 0.031 W/(m × K)
Sliding film
PTFE film (PolyTetraFluorEthylen)
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Product Description and Applications S-line
Scope of application/anti-corrosion protection/fire protection
Structural Thermal Break
In order to transfer the load from the exterior structure into the interior structure, the load bearing components penetrate the insulating layer. The supporting components are threaded rods, pressure plate, and a square tube. All load-bearing components are made from stainless steel. The product transfers normal forces and shear forces horizontally and vertically. To transfer bending moments, at least two Schöck Isokorb® type S22 are arranged above one another. Isokorb S-22 modules vertical spacing vary dependent upon forces where multiples can be arranged beside or above one another. Insulating shims can be arranged between individual Schöck Isokorb® type S22 components so the connection can be adjusted with respect to steel member dimensions and the load on the cross-section of the steel member to be connected. The horizontal distance between the threaded rods is fixed at 100 mm [3 15/16"]. The identification sticker on the top of the Schöck Isokorb® contains information about the type, height, manufacturer, and installation leaflets, which are supplementary to the detailed installation instructions that are provided with the delivery.
Anti-corrosion protection — The stainless steel used for Schöck Isokorb® type S22 corresponds to material no.: 1.4401, 1.4404 or 1.4571 or ASTM A312 TP 316. The S22 components will have a typical corrosion resistance expected for Mo-Cr-Ni austenitic stainless steels. This can be more accurately quantified by reference to specialist literature such as http://www.steel-stainless.org/ designmanual/Docs/En/English.pdf — Bimetallic corrosion The area of the galvanised steel is greater than the area of the stainless steel (bolts, washer and butt stop). As a result bimetallic corrosion that could lead to failure can be excluded for Schöck products, when using Schöck Isokorb® type S22 with galvanised or paint treated front plate. — Stress corrosion cracking An appropriate Schöck protection system needs to be provided in environments with a high chlorine content (e.g. inside indoor swimming pools, ...). For more information please contact our design department.
Fire protection The same on-site fire safety measures that apply to the overall load-bearing structure also apply to any freely accessible components of the Schöck Isokorb® type S22 or to any components situated inside the insulating layer. For more information please contact our Schöck design department.
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Product Description and Applications S-line
Structural Thermal Break
Steel construction with the Schöck Isokorb® S-line
Canopy steel structure without thermal insulation (facade layout not shown)
Schöck Isokorb® type S22: Canopy steel structure with thermal insulation (facade layout not shown)
The traditional steel member is thermally separated by the Isokorb® type S22. For this purpose, head plates are welded onto the steel members in order to transfer the loads into Schöck Isokorb® type S22. An example for designing head plates for steel members is described in the chapter titled "Schöck Isokorb® Structural Design: Schöck Isokorb® S-line End plate designing".
Materials for connecting components Materials and construction materials Connecting components End Plates
Material
ASTM A572 Grade 50
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Building regulations
ASTM A572
19
20
Load-bearing Behavior S-line
Structural Thermal Break
p g
ℓk
Mr
ℓk
Contents
Page
Load resistance and load transmission
22 - 24
Behavior in the event of temperature changes - Fatigue
25 - 26
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Schöck Isokorb® Load-bearing Behavior S-line Load resistance and load transmission
Structural Thermal Break
p g
ℓk Schöck Isokorb® type S22: Load distribution
Load distribution The load distribution for a canopy or a balcony with Schöck Isokorb® is determined in accordance with the ASCE 7 - 10. The illustration shows an example load case for dimensioning Schöck Isokorb®. The maximum load case is to be assumed.
Mr
ℓk Schöck Isokorb® type S22: Moment diagram
Vr
ℓk Schöck Isokorb® type S22: Shear force diagram
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Schöck Isokorb® Load-bearing Behavior S-line
Structural Thermal Break
Load resistance and load transmission
Schöck Isokorb® type S22: Canopy connection
Moment transfer Thermal breaks for cantilever canopies or balconies must be able to transfer moments and shear forces into the interior structure. The bending moment is transferred through the bolts of the upper Schöck Isokorb® type S22 and the bolts in combination with the Rectangular hollow profile of the lower Schöck Isokorb® type S22, broken down into a pair of forces (tension and compression force). The moment results from the force F multiplied by the inner lever arm a.
a
M
M=F×a The bigger the lever arm, the higher is the moment capacity.
Schöck Isokorb® type S22: simplified diagram of moment load resistance
Vertical Shear transfer It is assumed that the vertical shear force is on the safe side and only received by the lower Schöck Isokorb® type S22 in the pressure zone. The exterior head plate of the steel structure transfers the shear forces into the pressure plate of Schöck Isokorb® type S22 via the threaded rods. The shear forces are then further guided through the welded square tube and then back into the interior pressure plate of the steel structure via the head plate of Schöck Isokorb® type S22.
Head plate of the subsequent steel structure An example for designing head plates for steel members is described in the chapter titled "Schöck Isokorb® Structural Design: Schöck Isokorb® S-line End plate designing".
V
Schöck Isokorb® type S22: simplified diagram of vertical shear force load resistance
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Load-bearing Behavior S-line
Load resistance and load transmission Horizontal shear force transfer
Structural Thermal Break
The exterior head plate of the steel structure transfers the horizontal shear forces into the head plate of Schöck Isokorb® type S22 via the threaded rods. The horizontal shear forces are then further guided through the welded square tube and then back into the interior pressure plate of the steel structure via the pressure plate of Schöck Isokorb® type S22.
H
Interaction Steel connections can be formed with several Schöck Isokorb® types S22 allowing them to transfer bending moments as well as horizontal and vertical shear forces at the same time. In this process, a single type S22 can transfer normal forces and shear forces via the threaded rod and the hollow section. In this case, the following interaction formula must be taken into account:
Schöck Isokorb® type S22: simplified diagram of horizontal shear force load resistance (top view)
3Vr,v+2Vr,h+ Pr = max Pr ≤ Pc The formula takes the interaction for the threaded rod and the square tube into account.
Schöck Isokorb® type S22: simplified diagram of Interaktion
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Load-bearing Behavior S-line
Behavior in the event of temperature changes – Fatigue During temperature changes, the lengths of steel members change. Depending on the outdoor temperature, the exterior steel members either expand or contract. If the Schöck Isokorb® type S22 components are connected to steel members that cannot freely adjust their lengths perpendicular to the axis of Schöck Isokorb® type S22, a horizontal load is exerted on the Schöck Isokorb® type S22. Schöck Isokorb has been tested for fatigue stress due to fluctuating temperatures.
Structural Thermal Break
Δl
Δl Schöck Isokorb® S-line deformation with horizontal shifting
Schöck Isokorb® S-line exterior steel members contract during cold temperatures, thus creating a horizontal shift in type S22
Schöck Isokorb® S-line exterior steel members expand during hot temperatures, thus creating a horizontal shift in type S22 Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
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Load-bearing Behavior S-line
Structural Thermal Break
Behavior in the event of temperature changes – Fatigue Therefore we recommend designing the connecting steel structure in such a way that no fatigue loads from temperature deformation affect the Schöck Isokorb® type S22. For this purpose the secondary structure can be attached to the primary structure in such a way to allow for the horizontal movement or the end plate can be designed with horizontal elongated holes. Otherwise, we recommend limiting the length of the canopy or balcony slab to a certain size, depending on the Schöck Isokorb® type. This must be verified by the Engineer of Record (EOR) and adjusted if necessary. For design assistance please contact the Schöck design department. The permitted effective deformation length leff is the maximum range in which 2 or more Schöck Isokorb® type S22 components may be arranged if the structure connected to the Schöck Isokorb® type S22 cannot freely expand in length, thus leading to shifts in the Schöck Isokorb® type S22. This length is indicated in the product section.
Schöck Isokorb® type S22:elongated holes to allow movement in the secondary structure
Schöck Isokorb® type S22: recommended Permittet effective deformation length leff
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Structural Thermal Break
Product Description and Applications C-line
Contents
Page
Building with Schöck Isokorb®
28
Placement Details for the Schöck Isokorb®
29
Design and materials for Schöck Isokorb®
30 - 33
Schöck Isokorb® Fire Protection
33
Concrete Slab Construction with the Schöck Isokorb® C-line
34
Schöck Isokorb® Cast-in-Place Reinforcement
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27
Product Description and Applications C-line Building with Schöck Isokorb® C-line
Structural Thermal Break
Typical applications for Schöck Isokorb® are cantilevered constructions such as balconies in high-rise residentials or canopies in institutional buildings. Solutions are available for concrete and steel structures.
Placement details for Schöck Isokorb® The sample details illustrate the incorporation of Isokorb® at a typical balcony with brick cladding on the exterior wall and window wall. Schöck Isokorb® is located outboard of the backup wall to avoid structural interference with the attachment of steel stud tracks or window wall deflection header. Special consideration has also been paid to allow for a practical construction detail at the Isokorb® / concrete slab interface while maintaining waterproofing continuity and serviceability by illustrating removable flashings.
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Product Description and Applications C-line Placement details for Schöck Isokorb® C-Line EIFS backwall at balcony detail EIFS air/vapour/ moisture barrier sheathing
liquid applied urethane membrane
drip flashing (removable for maintenance) ISOKORB
Structural Thermal Break
backer rod and sealant with gaps for drainage concrete curb waterstop
sealant
sealant
Sample detail at a typical balcony with EIFS backwall for reference purposes
brick ties brick metal flashing brick vent and weep holes at first course drip flashing concrete curb
air/vapour/ moisture barrier sheathing
insulation Schöck Isokorb® type CM
waterstop
backer rod and sealant
sealant
Sample detail at a typical balcony with brick wall for reference purposes Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
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Product Description and Applications C-line Design and materials for Schöck Isokorb® C-line
Interior slab
Structural Thermal Break
Identification sticker
Balcony
Tension bar
Schöck Isokorb® type CM: Component designations
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Structural Thermal Break
Installation instructions
Gap for vibrator
Upper fire safety plate (optional product variant)
Fire safety strip (optional product variant) Upper plastic rail Insulating element Lower fire safety plate (optional product variant)
HTE module
Lower plastic rail Shear force bar
The Schöck Isokorb® is a load-bearing thermal break element and mainly works as follows: 1. The insulating element thermally separates the balcony slab from the interior slab and therefore reduces the thermal bridge. 2. The Schöck Isokorb® transfers the loads from the balcony slab into the interior slab.
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Product Description and Applications C-line
Structural Thermal Break
Design and materials for Schöck Isokorb® C-line
Schöck Isokorb® type CM: Internal view
In order to transfer the load from the balcony slab into the interior slab, the load bearing components penetrate the insulating element. The load bearing components are tension bars, shear force bars and HTE modules. Consisting of microsteel fibre reinforced high-performance concrete, enclosed in plastic casing, the HTE modules are embedded in the insulating element. They act as a pressure bearing, and transfer the pressure force from the balcony into the interior slab. Tension bars have a diameter of 12 mm (1/2"] and are held in position by the upper plastic rail. Shear force bars have a diameter of 8 mm (5/16"].
HTE pressure bearing with shear force bar
The Schöck Isokorb® is available with different load bearing capacities, depending on the real loads. Load bearing capacities differ in their number of tension bars, shear force bars and HTE modules. The Schöck Isokorb® type CM is available in different heights, ranging from 180 mm (7"] to 250 mm (9 7/8"].
The identification sticker on the top of the Schöck Isokorb® contains information about the type, the load capacity, the height, the manufacturer, and the installation leaflets, which are supplementary to the detailed installation instructions that are provided with the delivery.
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Product Description and Applications C-line Materials for Schöck Isokorb® / Fire protection Materials for Schöck Isokorb®
Tension bar
Shear force bar
Material
Conforming to
High-yield ribbed reinforcement bar BSt 500 B
German Standard DIN 488-1
Stainless steel ribbed reinforcement BSt 500 A NR material no. 1.4362, minimum nominal yield strength 700MPa [101.5 ksi]
German Standard DIN 488-1
High-yield ribbed reinforcement bar BSt 500 B
German Standard DIN 488-1
Stainless steel ribbed reinforcement BSt 500 A NR material no. 1.4362, minimum nominal yield strength 700MPa [101.5 ksi]
German Standard DIN 488-1
HTE pressure bearing
High-strength, fibre reinforced concrete Plastic sleeve of HD-PE plastic
Insulation material
Polystyrene hard foam, k = 0.031 W/(mK) [0.02 Btu/(hr ft F)]
Fire protection boards
Lightweight building boards, material class A1 Cement bound fire safety boards, mineral wool ρ ≥150 kg/m³ [9.37 lbs/ft3 ] Melting point T≥ 1000 °C [1,832°F]
Fire safety strips
made from Roku-strip
equivalent to ASTM A615 - 12 ASTM A955M-96
Structural Thermal Break
Materials for Schöck Isokorb®
ASTM A615 - 12 ASTM A955M-96
made from fibre-glass cement bonded board complying with DIN 4102-2 : 1977
Schöck Isokorb® fire protection Schöck Isokorb® is available with or without fire protection. If fire safety requirements apply, CM and CV types (with HTE modules) are available in a R120 version (120 minutes fire resistance), and types CMD, CVB and CEQ (without HTE modules) in a R90 version (90 minutes fire resistance). Integrated fire safety strips (type CM), made of intumescent material, and fire protection plates close the gaps opening under exposure to fire, ensuring that the Isokorb® reinforcement is protected from hot gas; the fire protection plates protrude by 10 mm [3/8"] on the top of the Schöck Isokorb® types CMD, CV, CVB and CEQ. R90 resp. R120 classifications are achieved with these versions, even without additional on-site fire safety measures (e.g. mineral coating). The picture shows Schöck Isokorb® type CM in R120.
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Product Description and Applications C-line
Structural Thermal Break
Concrete slab construction with the Schöck Isokorb®
Schöck Isokorb® type CM: Balcony connection indirectly supported
Balconies and other external structural components should be designed by the Engineer of Record (EOR) in agreement with ACI-318-11. A balcony structure with Schöck Isokorb® can be supported either directly or indirectly. Direct support means that the balcony slab is connected to the interior slab, and this is supported on a wall or an interior slab joist. With indirect support the balcony slab with Schöck Isokorb® is only connected to the interior slab. Indirect support is shown here. The following materials are assumed for the connecting components:
Materials for connecting components Materials and construction materials Connecting components
Material
Building regulations
Cast-in-place reinforcement, interior slab
Uncoated deformed reinforcing steel Grade 400R ASTM A615 – 12 ASTM A615 - 12 Grade 60
Cast-in-place reinforcement, balcony
Uncoated deformed reinforcing steel ASTM A615 – 12 Grade 60
ASTM A615 - 12
Concrete quality, interior components
Minimum concrete quality 27.5 MPa (4,000 psi) for interior components
ACI 318 - 11
Concrete quality, exterior components
Minimum concrete quality 27.5 MPa (4,000 psi) for exterior components
ACI 318 - 11
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Product Description and Applications C-line
Schöck Isokorb® C-line Cast-in-place reinforcement
Structural Thermal Break
Reinforcement for interior slab and balcony slab to be designed by the Engineer of Record (EOR) of the base building.
Upper reinforcement of slab specified by EOR
Lower reinforcement of slab specified by EOR
Reinforcement of a traditional balcony slab
Reinforced concrete cantilever balconies require upper and lower reinforcement and reinforcement surrounding the free borders. When using the Schöck Isokorb® the following cast-in-place reinforcement is required.
ℓd
cc
Schöck Isokorb® type CM: Overlap length ld concrete cover CC
The bar lengths are designed to meet the lap splice length requirements of ACI-318-11. The standard minimum concrete cover (CC) is defined by the Schöck Isokorb® as 40 mm [1 9/16"] (alternatively 55 mm [2 3/16"]).
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Product Description and Applications C-line Schöck Isokorb® Cast-in-place reinforcement
Recommendation as ≥ asi Isokorb®
Upper layer of slab reinforcement as'
Upper layer of slab reinforcement as'
Structural Thermal Break
Longitudinal bar upper layer required
Longitudinal bar upper layer required
Longitudinal bar upper layer required
Longitudinal bar lower layer required Link
Lower layer of slab reinforcement (In accordance with EOR specifications)
Lower layer of slab reinforcement (In accordance with EOR specifications)
Schöck Isokorb® type CM: cast-in-place reinforcement with indirect support
Please note the following for the placement of slab reinforcement with Schöck Isokorb®:
Two longitudinal bars (minimum #3, parallel to the insulating element) and U-bars (surrounding the free borders) are required at the interior slab.
The lap splice of the Schöck Isokorb® tension and shear force bars must be provided both at the interior and the balcony side. The required lap splice reinforcement (as) must be at least equal to the Schöck Isokorb® reinforcement (req. as ≥ exist. asi). Two longitudinal bars (minimum #3) are required parallel to the in insulating element at the balcony side, one bar being arranged in the upper reinforcement layer, the other in the lower.
36
The final reinforcement design and arrangement depends on the Isokorb® types. Please see the Isokorb® product chapters for further details. The existing slab reinforcement can be taken into account for the required reinforcement of connections with Schöck Isokorb®.
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Load-bearing Behavior C-line
80 mm 100 mm [3 1/8"] [3 15/16"]
Structural Thermal Break
ℓ
Mu
ℓ
Contents
Page
Load resistance and load transmission
38 - 39
Load-bearing behavior in earthquake load case
40
Vibration behavior
41
Deflection behavior
42 - 43
Behavior in the event of temperature changes - expansion joints
44 - 46
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Load-bearing Behavior C-line
Structural Thermal Break
Load resistance and load transmission
Schöck Isokorb® type CM: Balcony connection indirectly supported
Moment transfer Isokorbs for cantilever balconies must be able to transfer moments and shear forces into the interior slab. The bending moment is transferred through the tension bars (top side) and the pressure bearings (bottom side), split into a pair of forces (tension and compression force). The moment results from the force F multiplied by the inner lever arm a.
M a
M=F×a The higher the Isokorb® (and the bigger the lever arm), the higher is the moment capacity. The maximum moment that can be transferred is termed as ΦMn, as per ACI 318-11.
Schöck Isokorb® type CM: simplified diagram of moment load resistance
Vertical Shear transfer The vertical shear force is transferred into the bent corner of the tension bar. There it is split into a tension and a compression component, the tension component being transferred by the shear force bar and the compression component by the pressure bearing. The maximum possible shear force that can be transferred is termed as Vs, as per ACI 318-11.
V
Schöck Isokorb® type CM: simplified diagram of shear force load resistance
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Load-bearing Behavior C-line
ℓ
Structural Thermal Break
Load resistance and load transmission
80 mm 100 mm [3 1/8"] [3 15/16"]
Schöck Isokorb® type CM: Load distribution
Load distribution The load distribution for a balcony with a Schöck Isokorb® is determined in accordance with ASCE 7. The illustration shows an example load case for dimensioning the Schöck Isokorb®. The fixing should be assumed to be 100 mm [3 15/16"] behind the Schöck Isokorb® C-line. The maximum load must be determined from the load cases of the applicable codes.
Mu
ℓ Schöck Isokorb® type CM: Moment diagram
Vu ℓ Schöck Isokorb® type CM: Shear force diagram Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
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Load-bearing Behavior C-line
Structural Thermal Break
Load-bearing behavior in earthquake load case
Earthquake vibration
Movement directions of a building during an earthquake
Buildings in seismic zones (earthquake zones) have to resist additional loads from the earthquake. The balcony is considered to be an external component. Country-specific regulations apply to this. The earthquake load is a rare load, in which case safety reserves may be activated in the Schöck Isokorb®. The Schöck Isokorb® type CEQ absorbs the loads from earthquakes in interaction with the Schöck Isokorb® type CM.
The loads can also be absorbed in interaction with type CV and CMD, for further information please contact the Schöck Design department.. The required number of Schöck Isokorb® types CEQ is determined in accordance with the earthquake load analysis. Earthquake loads typically result in the following movements: horizontal in the direction of both building axes, upwards and downwards. The balconies follow these movements after a delay. Resulting loads are explained below.
type CEQ type CM type CEQ type CM type CEQ type CM type CEQ Resisting earthquake loads: Schöck Isokorb® type CEQ in combination with Schöck Isokorb® type CM
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Load-bearing Behavior C-line Vibration behavior
ℓ
Structural Thermal Break
h 80mm 100mm [3 1/8"] [3 15/16"]
Schöck Isokorb® type CM: Flexural slenderness
In the context with balconies, the term “slenderness” describes the ratio of slab thickness to cantilever length. This slenderness will influence the vibration behaviour of the balcony slab. Therefore, we recommend limiting the slenderness; for further details, please see the product chapter.
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Load-bearing Behavior C-line Deflection behavior
Structural Thermal Break
w1 100mm [3 15/16"]
ℓs Deformation of a balcony slab without Schöck Isokorb®
torsional spring
w2
α
w1
Deformation of a balcony slab with Schöck Isokorb®
Deflection Balcony deformation is a result of loading, twisting of the interior slab and deformation of the balcony. Generally, the deformation is measured at the tip of the cantilever. The Schöck Isokorb® is simulated by two springs, the top spring simulating the tension bar, the bottom spring simulating the HTE pressure bearing. When exposed to a bending moment, the bottom spring is compressed, and the top spring is expanded. This produces a twist angle α in the Schöck Isokorb®, statically simulated by a torsion spring as illustrated. With the Schöck Isokorb® being located between the floor slab and the balcony slab, deformation w2 from the Schöck Isokorb® must be taken into consideration in addition to the deformation w1 of the balcony slab. Please see the product chapters for specification of the deformation factor tan α.
42
The Schöck Isokorb® tension bar and pressure module act as springs
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Load-bearing Behavior C-line
w
Structural Thermal Break
Deflection behavior
horizontal axis
Camber of formwork when concreting
Camber In order to optimise the deformation of the balcony, the formwork can be cambered during installation. Usually, camber will be designed to counter deformation due to self weight, allowing tolerance of ± 5 mm [3/16"]. Drainage direction should be taken into account. Camber should be reduced for outward drainage and increased for inward drainage.
The total Camber "w" for a balcony depends on several factors: — the amount of deformation from the angle of rotation of the interior slab — the amount of deformation of the balcony slab, — the amount of deformation from the Schöck Isokorb® and — the drainage direction of the balcony. All these points must be taken into consideration when determining the camber.
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Load-bearing Behavior C-line
Structural Thermal Break
Behavior in the event of temperature changes – expansion joints
- 5 °C Temperature deformation and possible crack formation in a balcony slab without Schöck Isokorb®
+ 20 °C Contraction of a balcony slab due to cooling, horizontal compression load on Schöck Isokorb®
Expansion of a balcony slab due to heating up, horizontal tension load on Schöck Isokorb®
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Load-bearing Behavior C-line
Structural Thermal Break
Behavior in the event of temperature changes – expansion joints
Δl
Δl
Deformation under thermal loads
A balcony slab expands when heated up and contracts when cooled down. With a continuous balcony slab, cracks can occur in the concrete slab due to constraint. One result can be the ingress of moisture.
Δl
The Schöck Isokorb® forms an expansion joint. The tension bars and the shear force bars in the Schöck Isokorb® repeatedly deflect slightly across their axis. Fatigue tests were conducted for the following loads applied to the Schöck Isokorb® type CM 100 load reversals, movement distance ±2.0 mm [5/64"], 2000 load reversals, movement distance ±1.7 mm [1/16"], 20000 load reversals, movement distance ±1.1 mm [3/64"]. For a symmetrical balcony slab, the tension bars and shear force bars of the Schöck Isokorb® at the edges of the balcony slab deflect more than the bars in the centre of the balcony slab.
HTE module deflection
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Tension bar deflection
45
Load-bearing Behavior C-line
Behavior in the event of temperature changes – expansion joints Therefore, we recommend limiting the length of the balcony slab to a certain size, depending on the Schöck Isokorb® type. This must be verified by the Engineer of Record (EOR) and adjusted if necessary.
Structural Thermal Break
For corner balconies, only half of the length should be used, starting from the corner. If a balcony slab is longer, expansion joints must be provided. To form an expansion joint, the slab is cut and a Schöck dowel type ESD is arranged between the two slabs in order to prevent different slab levels. Expansion joint formation
≤e
/2
e
Schöck Isokorb® type CM: recommended maximum expansion joint spacing
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Structural Thermal Break
Installation Guidelines C-line
Schöck Isokorb® = T.O. wall cold joint
Contents
Page
Schöck Isokorb® installation orientation
48
Installation with prefabricated floor elements or interior slab joists
49
Installations in cast in place concrete
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47
Installation Guidelines C-line
Schöck Isokorb® C-line installation orientation The Schöck Isokorb® type CM does not have a symmetrical design. Attention must therefore be paid to the installation orientation - the tension bar must be on top.
Structural Thermal Break
Cross-sections must be shown in the plans indicating the location and orientation of the Schöck Isokorb®.
M e
Schöck Isokorb® type CM: Upper tension bar moment load resistance required.
Warning: — Always install the Schöck Isokorb® in the correct position. The top part of the Schöck Isokorb® is clearly marked as such and must be visible when installation is complete. — The tension bar must be on top when it is installed!.
Schöck Isokorb® type CM correct installation: Tension bar on top
Schöck Isokorb® type CM wrong installation: Tension bar at bottom
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Installation Guidelines C-line
Installation with prefabricated floor elements or interior slab joists The Schöck Isokorb® can be used with prefabricated or precast parts. It can be installed directly in the balcony slab in the prefabrication shop and supplied to the building site together with the concrete slab. Please note: shear friction verification is paramount!
Structural Thermal Break
Force transfer from the pressure bearings into the surrounding concrete is achieved via the tight fit between the pressure bearings and the freshly poured in-situ concrete. Therefore, it must be ensured on the construction site that a casting joint of at least 50 mm [2"] is formed adjacent to the pressure bearing for type CM. A different distance may be required for other types in the Schöck Isokorb® product range. This is specified in the product chapter. Schöck Isokorb® type CM: tight fit of the HTE module
Schöck Isokorb® type CM: required casting joint installation.
≥ 200 mm [8"]
Schöck Isokorb® type CM: the casting joint Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
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Installation Guidelines C-line
Installations in cast in place concrete For installations in cast in place concrete, please note as follows:
Structural Thermal Break
Arrange cast-in-place reinforcement, place Schöck Isokorb®, pour concrete, follow curing time requirements in accordance with national standards, support for an additional 28 days. It must be ensured that there is a tight fit between the pressure bearings and the freshly poured concrete! Therefore, concreting joints must be arranged below the lower edge of the Schöck Isokorb®. Detailed installation instructions for the products are shown in the installation section.
interior slab Schöck Isokorb® = T.O. wall cold joint
Schöck Isokorb® type CM: Pay attention to concreting joint during installation (direct mounting).
Schöck Isokorb® = T.O. wall cold joint
Schöck Isokorb® type CM: Installation (direct mounting).
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Installation Guidelines C-line
Installations in cast in place concrete
Structural Thermal Break
Force transfer from the pressure bearings into the surrounding concrete is achieved via the tight fit between the pressure bearings and the freshly poured in-situ concrete. Therefore, it must be ensured on the construction site that a casting joint of at least 50 mm [2"] is formed adjacent to the pressure bearing for type CM. A different distance may be required for other types in the Schöck Isokorb® product range. This is specified in the product chapter.
Schöck Isokorb® type CM: HTE module tight fit
≥ 150mm [6"]
Schöck Isokorb®
Schöck Isokorb® type CM: required casting joint installation
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52
Schöck Isokorb® Structural Thermal Break Schöck Isokorb® Products Schöck Isokorb® Structural Design
Products
Schöck Isokorb® Installation
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Schöck Isokorb® Products Schöck Isokorb® type summary Schöck Isokorb® S-line (steel beams)
Page
Free cantilevered steel structures Type S22
Product Structural design
57 134
S22
Schöck Isokorb® C-line (concrete slabs)
Page
Free cantilevered balconies Type CM
Product Structural design
69 140
CM Type CMD
Product
83
Product
97
Product
109
Product
121
CMD
Supported balconies Type CV
CV Type CVB
for punctual load peaks
CVB
Cantilevered balconies with seismic loads Type CEQ
(use of CEQ only in interaction with the basic types) CEQ
Products for further applications
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Products
for "run-through slabs"
Schöck Isokorb®
Notes for use and structural design — The Schöck Isokorb® products are load-bearing thermal insulating connection elements typically used to connect an exterior structural member (e.g. balcony slab, canopy) to an interior structural member (e.g. floor slab). The Schöck Isokorb® is specifically used in reinforced concrete structures to connect 180 mm [7"] to 250 mm [10"] thick exterior cantilever concrete (balcony) slabs to equal thickness interior slabs while forming a thermal break, transferring load and maintaining full structural integrity. This product contributes to the overall thermal insulation of the building envelope by reducing cold bridging between internal and external elements. — Construction with Schöck Isokorb® C-line provided in this technical manual has been evaluated in accordance with ACI 318-11 Building Code Requirements for Structural Concrete. — The design capacities of the Schöck Isokorb® type S22 have been independently checked and approved as compliant with ANSA/AISC 360-10 Specification for Structural Steel Buildings. — With different concrete strengths (e.g. balcony 27.5 MPa [4,000 psi], interior slab 24 MPa [3,500 psi]) the weaker concrete is critical with regard to Schöck Isokorb® designing. — The concrete strength is based on standard test cylinder specified in ACI 318-11. — In the following product pages, only Schöck Isokorb® reinforcement is shown. Slab reinforcement is not shown for clarity.
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Schöck Isokorb® S-line type S22
S22
Products
Schöck Isokorb® type S22
The Schöck Isokorb® type S22 is used to transmit normal force and shear force. Moments can be transmitted by combining several modules.
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Schöck Isokorb® S-line type S22 Element arrangements
Products
S22
— The end plates of the connecting structure to be designed by the Engineer of Record (EOR) and are not supplied by Schöck According to ANSI/AISC 360-10 the vertical force can be transmitted up to hole tolerances of 2 mm [5/64"]. A diameter of 24 mm [15/16"] for the bolt hole is recommended. — Only loads that are essentially static may be transmitted from the connecting structure into the Schöck Isokorb® type S22. — Undesigned eccentric loads from slab torsion, must be avoided. — Verification of torsion moment resistance must be provided in the connecting structure. Aletrnatively it could be absorbed by combining several types S22. — The connecting structure must be designed in such a way that vertical and horizontal force is introduced into the end plate of the Schöck Isokorb® type S22 by contact from the end plate of the connecting structure, without space between type S22 and end plate. — It is recommended to design the connecting steel structure in such a way that no fatigue loads from temperature deformation affects the Schöck Isokorb® type S22. If it is not possible to avoid this load, please pay attention to the notes on Expansion Joints, page 65.
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Schöck Isokorb® type S22 Element arrangements
End plate
End plate
Steel roof structure
Steel member Steel structure Outside
Column support Outer area
Figure 1: Combination of 2 Schöck Isokorb® type S22 for unsupported cantilevered steel structures
Insulating layer e.g. window front
S22
Column support Inner area
Figure 2: Schöck Isokorb® type S22 for separation within the structural system
End plate
Steel member
Inside
Outside
End plate
Steel structure
Roof Insulation
Products
Cantilevered steel member
End plate
Slab / Roof Column support
Figure 3: Schöck Isokorb® type S22 for supported steel structures
Inside
Figure 4: Schöck Isokorb® type S22 for roof structures
Position of Schöck Isokorb® type S22 The Schöck Isokorb® type S22 should be located in the insulating layer.
Notes: — When using the Schöck Isokorb® type S22 for roof structures, the connection must be calculated for flexural stiffness. Please contact Schöck design department. — Special boundary conditions must be taken into consideration when used in columns as a result of slab rotating angles and imperfections. Please contact the Schöck design department. — End plate not provided by Schöck
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Schöck Isokorb® S-line type S22 Views/dimensions Schöck Isokorb® type S22 The S22 module is used to resist compressive forces, tensile forces and shear forces. It consists of an insulating element 180 (L) x 80 (W) x 80 (D) mm [7 1/16'' (L) x 3 1/8" (W) x 3 1/8" (D)], two stainless threaded bars with corresponding nuts and a rectangular hollow section which is welded into the module. The rectangular hollow section transmits the shear forces. The element can transmit forces in the x, y and z-direction. Different load combinations, including tensile forces, can be carried by the type S22, although the interaction condition 3Vr,v+2Vr,h+ Pr = max Pr ≤ Pc must be satisfied. S22
Schöck Isokorb® type S22 Front elevation
Side elevation
180 mm [7 1/16"]
70 mm [2 3/4"]
150 mm
20 mm [13/16"]
[5 7/8"] S22 module
Products
M22
80 mm [3 1/8"]
70 mm [2 3/4"] 20 mm [13/16"]
60 mm [2 3/8"]
Z
80 mm [3 1/8"]
M22 100 mm [3 15/16"]
Isometric view
260 mm [10 1/4"]
X
Y
Views - Schöck Isokorb® type S22
Notes: — If required, the insulating element can be cut off up to the steel plates (150 × 60 mm [5 7/8"x2 3/4"] for the type S22) — The possible attachment length for the end plates of the connecting structure is 70 mm [2 3/4"] — The horizontal distance between the threaded rods M22 of 100 mm [3 7/8"] is fix
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Schöck Isokorb® S-line type S22 Combination options
Combination options for Schöck Isokorb® type S22 A moment can be transferred from the exterior structure to the interior structure with 2 Schöck Isokorb® type S22 arranged on top of each other. The height that is required to transfer the moment is achieved using 2 Schöck Isokorb® modules and insulating adapters. The adapters are available in heights of 20 mm or 30 mm [3/4" or 1 3/16"]. Several insulating adapters can be arranged on top of each other. The quantity, arrangement and spacing of the modules depends on the type of load and the level thereof, and can be adapted accordingly. Front elevation
Front elevation
Products
S22
Example arrangement of Schöck Isokorb® modules S22 for transmitting increased bending moment, see also design example page 134
Front elevation
Example arrangement of Schöck Isokorb® modules S22 for transmitting increased bending moment, see also design example page 136
Side elevation
180 mm [7 1/16"]
70 mm [2 3/4"]
150 mm
20 mm [13/16"]
[5 7/8"] S22 module
80 mm [3 1/8"]
70 mm [2 3/4"] 20 mm [13/16"]
60 mm [2 3/8"]
M22
Isometric view
80 mm [3 1/8"]
M22 100 mm [3 15/16"]
260 mm [10 1/4"]
20 mm [13/16"]
Insulating adapter
20 mm [13/16"]
30 mm [1 3/16"]
Insulating adapter
30 mm [1 3/16"] X
S22 module M22
Z Y
M22
Views - Schöck Isokorb® two modules S22 combination
The required number of insulating adapters is determined by the Schöck Design department and enclosed with the delivery. Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
61
Schöck Isokorb® S-line type S22 Design and capacity table Schöck Isokorb® type
S22 modules
Combination 2 x S22
u bl e
u bl e
Design values per module (ULS)
u bl e
LRFD
S22
Horizontal Shear Strength Vc,h Vertical Shear Resistance Vc,v Tensile/Compressive Strength Pc Moment Strength Mc,y
Units kN
±6.0 3)5)
±6.0 5)
(kips)
(±1.35) 3)5)
(±1.35) 5)
kN
36.0
3)
(kips)
(8.1)
3)
kN
225.0
(kips) kNm (kip-ft)
Products
Horizontal Shear Strength Vc,h Vertical Shear Resistance Vc,v Tensile/Compressive Strength Pc Moment Strength Mc,y Moment Strength Mc,z
(8.1)
3)
225.0 3)
(50.6) 3)
(50.6) 3)
0
a × Pc1)
4)
(0) 4)
a × Pc1)
2)5)
2)5)
kN
±4.0 3)5)
±4.0 5)
(kips)
(±0.90) 3)5)
(±0.90) 5)
kN
24.0 3)
24.0
(kips)
(5.4)
(5.4)
kN
149.8
Moment Strength Mc,z ASD
36.0
Units
3) 3)
149.8 3)
(kips)
(33.67) 3)
(33.67) 3)
kNm
0 4)
a × Pc1)
(0)
a × Pc1)
(kip-ft)
4)
2)5)
2)5)
LRFD = Load and Resistance Factor Design ASD = Allowable Strength Design
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Schöck Isokorb® S-line type S22 Design and capacity table
a
Z X
Y
Schöck Isokorb® two modules S22
S22
2) 3)
4)
5) 6)
a = distance between the tension rods and compression rods of the Isokorb® element (inner lever arm), minimum possible centre line separation between tension bars and compression bars = 60 mm [2 3/8"] (without insulating adapters after processing of the polystyrene. We recommend that you discuss the static system and calculations with the Schöck design department. The interaction 3Vr,v + 2Vr,h+ Pr = max Pr ≤ Pc needs to be taken into account in the event of simultaneous tensile force and shear force loads. When using at least two modules arranged one above the other, it is possible to transfer both positive and negative forces (moments and shear forces) in accordance with the design variants on pages 61. Please make sure that you read the notes on expansion joints/fatigue resistance on pages 24 - 26 and 65 - 66. In moment connections, the shear forces are assigned to the types in the pressure zone.
Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
Products
1)
63
Schöck Isokorb® S-line type S22
Torsion spring strength/notes on calculations Estimation of deformation variables due to Mc in the Schöck Isokorb® connection Torsion spring strength/buckling angle resulting from bending moment from unfactored loads Torsion spring strength c [kNmm/rad]
Design variants
Buckling angle Φ [rad]
Bolt
S22
No. 1 - see page 134
6000 x a2 kNmm/rad [3426 x a2 kip-in/rad]
No. 2 - see page 136
24000 x a2 kNmm/rad [13704 x a2 kip-in/rad]
Φ=
M C
a [mm] = refer to the design variants on pages 134 and 136. M = bending moment from unfactored loads. Deformations resulting from normal forces and shear forces can be ignored. Values in table above assume average secant modulus of stainless steel under working load of 179 kN/mm² [1022 kip/in]
Products
C
I
I=∞
I
Static model for the estimation of flexural stiffness
Notes on calculations — Basis: The design capacities of the Schöck Isokorb® type S22 have been independently checked and approved as compliant with ANSI/AISC 360-10. The design values must be compared with factored loading in accordance with limit states design as prescribed by the applicable codes. — Certification: The calculations confirmed that the predicted resistances of the this component meet or exceed the design values published in the technical manual. — End plate thickness: The end plates of the connecting steel structure must be designed by the Engineer of Record (EOR). A possible verification method is shown on pages 139. — Dynamic loads: The Schöck Isokorb® type S22 is only intended for use with the following loads: i.e. gravity, snow,wind, live load, dead load,earthquake, temperature. — The Schöck Isokorb® type S22 is unsuitable for absorbing torsion moments Torsion moments should be absorbed by the connecting construction or alternatively by combining several types S22. — Due to the higher stiffness of the pressurized Schöck Isokorb® type S22, the horizontal shear forces are primarily transferred by means of the Schöck Isokorb® type S22 in the pressure zone. This results in an offset moment that must be taken into consideration in the exterior structures.
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Schöck Isokorb® S-line type S22 Expansion joints/fatigue resistance Horizontally movable connections Detail 4
Detail 1
Elongated hole
Elongated hole
S22 Detail 1: Adjustable attachment of secondary support structure to main support structure with slotted connection to accommodate thernal movement
Detail 4: Expansion joint formation by means of slotted connection between secondary support structure and main support structure.
Effective deformation length leff
The permitted effective deformation length is the maximum range in which two or more Schöck Isokorb® type S22 components may be arranged if the structure connected to the Schöck Isokorb® type S22 cannot freely expand in length, thus leading to horizontal shifts in the Schöck Isokorb® type S22. This length will determine the fatigue resistance design. Products
Expansion joint length lex
This length covers the expansion joint spacing and can also be bigger than the effective deformation length Lex ≥ leff The permitted effective deformation length leff depends on — the design of the on-site end plate (hole tolerances) — the temperature collective — the load reversals — the stiffness of the exterior steel structure The definition and verification of these boundary condition lies with the Engineer of Record (EOR). Please feel free to contact our Canadian Design Department for further information.
Permitted effective deformation length leff The Schöck Isokorb® is able to absorb temperature deformations of the exterior steel structure complying with an effective deformation length leff of up to 10.5 m [34'-5"]. Based on a temperature difference of 70 °C [126 °F] and a rigid steel structure, a hole tolerance of 2 mm [5/64"] is required. Concerning the load reversals and also for differing boundary conditions please feel free to contact our Schöck Design Department for further information.
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Schöck Isokorb® S-line type S22 Expansion joints/fatigue resistance
Inside
T
T
T
T
Elongated hole
T
Elongated hole
S22 Outside
T
T
T
Products
Expansion joint lenght = effective deformation lenght
Schöck Isokorb® type S expansion joint spacing e zero movement point is at the most central fixed point
Inside
Elongated hole
T
Outside
Elongated hole
T
Effective deformation lenght Expansion joit lenght
Schöck Isokorb® type S22 expansion joint spacing is higher than the spacing of the permitted effective deformation length
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Schöck Isokorb® S-line type S22 Check list ~
Have the member forces on the Isokorb® connection been determined at the design level?
~
Will the Isokorb® element be used under primarily static loads?
~
Are temperature deformations assigned directly to the Isokorb® connection? Expansion joint spacing?
~
Will the Isokorb® connection be exposed to an environement with a high chlorine content (e.g. inside indoor swimming pools)?
~
Is there a fire safety requirement for the overall load-bearing structure/Isokorb®?
~
Calculation of the Isokorb® elements
S22
- Are the selected modules adequately dimensioned - refer to the “Design and calculation table” on page 62?
~
Did the deformation calculations for the overall structure take into account the deformation due to M in the Isokorb® connection?
~
Have the tightening torques for the bolted connections been marked in the design drawings? The nuts should be tightened spanner-tight without planned preload; the following tightening torques apply:
Products
- Is the interaction relationship 3Vr,v + 2Vr,h + Pr = max Pr ≤ Pc satisfied for S22 under tensile loads with simultaneous shear loads?
S22 (bolt ø 22 mm): Applied Torque M = 80 Nm [59 lb-ft]
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68
Schöck Isokorb® C-line type CM
CM
Products
Schöck Isokorb® type CM
The Schöck Isokorb® type CM is suitable for cantilevered reinforced concrete slabs. (C for concrete slab) It transmits negative moment (M) and positive shear force.
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Schöck Isokorb® C-line type CM Section/element arrangement
Balcony
CM
Interior slab
Schöck Isokorb® type CM with window wall systems
Balcony
Interior slab
Schöck Isokorb® type CM with steel studs, facing shell and insulation layer in between
Position of Schöck Isokorb® type CM The Schöck Isokorb® type CM should be located in the insulating layer.
Products
Orientation of the Schöck Isokorb® type CM Attention: the Schöck Isokorb® type CM does not have a symmetrical design. — The tension bar must be on top. — Pay attention to installation orientation and show a cross-section view on the design drawings. — The Schöck Isokorb® type CM has the same design at the balcony side and the interior slab side.
Element arrangement
Interior slab
Interior slab
Type CM
Support
1x type CM-CC55
Balcony type CM
type CM-CC40
Balcony Schöck Isokorb® type CM Cantilever balcony
Schöck Isokorb® type CM Balcony with outer corners
Note: — In the presence of horizontal loads, e.g. from earthquakes, Schöck Isokorb® module CEQ must be used.
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Schöck Isokorb® C-line type CM Slab geometry/expansion joints Recommended maximum cantilever length The following maximum cantilever lengths "ℓ" are recommended in order to avoid excessive vibration in the balcony slab. Concrete cover for tension bars CC = 40 mm [1 9/16"]
180 mm [7"]
190 mm [7 1/2"]
200 mm [7 7/8"]
1.95 m [6'-5"]
2.1 m [6'-10"] 1.88 m [6'-2"]
CC = 55 mm [2 3/16"]
max ℓ with Isokorb® height H 210 mm [8 1/4"]
220 mm [8 5/8"]
230 mm [9"]
240 mm [9 1/2"]
250 mm [9 7/8"]
2.25 m [7'-4"]
2.39 m [7'-10"]
2.54 m [8'-4"]
2.68 m [8'-10"]
2.83 m [9'-3"]
2.98 m [9'-8"]
2.03 m [6'-6"]
2.17 m [7'-2"]
2.32 m [7'-7"]
2.46 m [8'-0"]
2.61 m [8'-6"]
2.76 m [9'-0"]
CM
Cantilever length for the structural calculations The support of the balcony is assumed to be 100 mm [3 15/16"] from the Schöck Isokorb® insulating element at the interior slab side.
H
Products
Interior slab
CC
h
Balcony
100 mm [3 15/16"]
ℓ
Expansion gaps (recommended balcony length) The expansion joint spacing shown below corresponds to a temperature difference of ∆T = 70 °C [126 °F].
≤ 5.65 m
≤ 11.30 m
[18'-6 7/16"]
[37'-0 7/8"] Schöck dowel type ESD
Schöck dowel type ESD Expansion joint type CM
Expansion joint type CM
l
type CV
type CM
Plan view: Maximum expansion joint spacing, Schöck Isokorb® type CM
Note: — The maximum expansion joint spacing must be verified by the Engineer of Record (EOR). — The expansion gap must be free to deform in the longitudinal direction. This can be achieved, for example, using a Schöck Dorn ESD-K (made from stainless steel A4). Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
71
Schöck Isokorb® C-line type CM Concrete cover/type designation Concrete cover CC The concrete cover of the Schöck Isokorb® type CM is set to 40 mm [1 9/16"] (CC40) or 55 mm [2 3/16"] (CC55). We recommend choosing the CC55 concrete covering for balcony slabs with a sloping surface. This allows the surface of the balcony slab to be sloped by 2%.
Interior slab
40 mm [1 9/16"]
Balcony
80 mm [3 1/8"]
ℓ
h
H
CM
100 mm [3 15/16"]
≥ 40 mm [1 9/16"]
Balcony
55 mm [2 3/16"]
Concrete cover with level balcony slab
80 mm [3 1/8"]
ℓ
h
H
Products
≤2%
Interior slab
100 mm [3 15/16"]
Concrete cover with sloped balcony slab
Type designation in design drawings The following type designation specifies the Schöck Isokorb® type that is required. The type designation is indicated on the design drawings. The type designation is printed on the sticker of the Schöck Isokorb® type as a recognition feature. Type designation in design drawings
With fire protection
CM20-CC40-H200-R120
Type/load capacity Concrete cover Schöck Isokorb® height Fire protection 72
Balcony
Interior slab 740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"]
CC CC = 40 mm [1 9/16"]
H 20 mm [13/16"] H = 200 mm [7 7/8"]
Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
Schöck Isokorb® C-line type CM Product cross-section Balcony
Interior slab 740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"] 55 mm [2 3/16"] H 20 mm [13/16"]
414 mm
417 mm
[1'-4 5/16"]
[1'-4 7/16"]
H = 200 - 250 mm [7 7/8"] - [9 13/16"]
CM
Product cross-section for Schöck Isokorb® type CM10 to CM40, concrete cover CC40
Balcony
Interior slab 740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"] 40 mm [1 9/16"] H 20 mm [13/16"] 417 mm
[1'-4 5/16"]
[1'-4 7/16"]
H = 180 - 250 mm [7 1/16"] - [9 13/16"]
Products
414 mm
Product cross-section for Schöck Isokorb® type CM10 to CM40, concrete cover CC55
Schöck Isokorb® length and configuration Schöck Isokorb® type Isokorb® length Tension bars Shear force bars Pressure bearings (pcs.)
CM10
CM20
CM30
CM40
1.0 m [3'-3"]
1.0 m [3'-3"]
1.0 m [3'-3"]
1.0 m [3'-3"]
6 ø 12
8 ø 12
10 ø 12
12 ø 12
4 ø 8+4 ø 8
4 ø 8+4 ø 8
4 ø 8+4 ø 8
4 ø 8+4 ø 8
8
10
12
14
Note: — The product cross-sections of the 4 load capacities (CM10, CM20,CM30,CM40) of the Schöck Isokorb® type CM are identical for the respective concrete cover. The load capacities of the Schöck Isokorb® type CM vary in the number of tension bars, shear force bars and HTE pressure bearings. — The Schöck Isokorb® type CM may be split at the non-reinforced locations. The spacing of the pressure elements from the free edge of the reinforced concrete slab must be at least 50 mm [2"], and the axis spacing of the shear force bars must be at least 100 mm [4"] and no more than 150 mm [6"]. — The shear force bars have differing lengths as shown in brackets — The Schöck Isokorb® consists of metric components. — reinforcement bars ø 8 correspond to 5/16" — reinforcement bars ø 12 correspond to 1/2"
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Schöck Isokorb® C-line type CM Overhead view of product
Balcony
Interior slab
75 mm [2 15/16"]
100 mm [3 15/16"] 200 mm [7 7/8"]
150 mm [5 7/8"] 200 mm [7 7/8"] 150 mm [5 7/8"]
1000 mm [3'-3 3/8"]
200 mm [7 7/8"]
250 mm [9 13/16"]
400 mm [1'-3 3/4"]
200 mm [7 7/8"]
CM 150 mm [5 7/8"]
200 mm [7 7/8"] 200 mm [7 7/8"]
150 mm [5 7/8"] 200 mm [7 7/8"] 100 mm [3 15/16"]
Products
75 mm [2 15/16"] 414 mm
414 mm
[1'-4 5/16"]
[1'-4 5/16"]
740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"]
Overhead view of Schöck Isokorb® type CM10
Balcony
Interior slab
75 mm [2 15/16"]
100 mm [3 15/16"] 200 mm [7 7/8"]
100 mm [3 15/16"] 200 mm [7 7/8"]
100 mm [3 15/16"]
200 mm [7 7/8"]
100 mm [3 15/16"]
1000 mm [3'-3 3/8"]
250 mm [9 13/16"]
400 mm [1'-3 3/4"]
100 mm [3 15/16"]
200 mm [7 7/8"]
200 mm [7 7/8"]
100 mm [3 15/16"]
200 mm [7 7/8"]
100 mm [3 15/16"]
200 mm [7 7/8"] 100 mm [3 15/16"]
75 mm [2 15/16"] 414 mm
414 mm
[1'-4 5/16"]
[1'-4 5/16"]
740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"]
Overhead view of Schöck Isokorb® type CM20
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Schöck Isokorb® C-line type CM Overhead view of product
Balcony
Interior slab
75 mm [2 15/16"]
100 mm [3 15/16"] 200 mm [7 7/8"]
100 mm [3 15/16"] 200 mm [7 7/8"]
100 mm [3 15/16"]
200 mm [7 7/8"]
100 mm [3 15/16"] 50 mm [1 15/16"] 1000 mm [3'-3 3/8"]
150 mm [5 7/8"]
400 mm [1'-3 3/4"]
200 mm [7 7/8"]
CM
50 mm [1 15/16"] 100 mm [3 15/16"]
200 mm [7 7/8"]
100 mm [3 15/16"]
200 mm [7 7/8"]
100 mm [3 15/16"]
200 mm [7 7/8"] 100 mm [3 15/16"]
75 mm [2 15/16"] 414 mm
414 mm
[1'-4 5/16"]
[1'-4 5/16"] 740 mm [2'-5 1/8"]
80 mm [3 1/8"]
Products
740 mm [2'-5 1/8"] Overhead view of Schöck Isokorb® type CM30
Balcony
Interior slab
75 mm [2 15/16"]
100 mm [3 15/16"]
50 mm [1 15/16"]
200 mm [7 7/8"]
100 mm [3 15/16"]
200 mm [7 7/8"]
50 mm [1 15/16"] 200 mm [7 7/8"]
100 mm [3 15/16"] 50 mm [1 15/16"] 1000 mm [3'-3 3/8"]
150 mm [5 7/8"]
400 mm [1'-3 3/4"]
200 mm [7 7/8"]
50 mm [1 15/16"] 100 mm [3 15/16"]
200 mm [7 7/8"]
50 mm [1 15/16"] 200 mm [7 7/8"]
100 mm [3 15/16"] 50 mm [1 15/16"]
200 mm [7 7/8"] 100 mm [3 15/16"]
75 mm [2 15/16"] 414 mm
414 mm
[1'-4 5/16"]
[1'-4 5/16"]
740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"]
Overhead view of Schöck Isokorb® type CM40 Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
75
Schöck Isokorb® C-line type CM Design
The support is assumed to be 100mm [4"] from the Schöck Isokorb® insulating element at the interior slab side.
+ V M
H
CC
h
Support
l
Notes — — — — —
With different balcony slab and floor slab concrete qualities, the weaker concrete should be used with the tables above. The Engineer of Record (EOR) must confirm strength of the slabs at both sides of the Schöck Isokorb®. The shear capacity of the slabs to be verified by the Engineer of Record (EOR). For seismic loads the Schöck Isokorb® CM has to be combined with the Schöck Isokorb® type CEQ. The capacities are considering a maximum permitted bar separation according ACI 381-11. This has to be taken into account by the Engineer of Record (EOR).
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Products
CM
100 mm [3 15/16"]
Schöck Isokorb® C-line type CM Design
Product selection table as per ACI 318-11 Concrete cover CC = 40 mm [1 9/16"]
Concrete cover Isokorb® height CC = 40 mm [1 9/16"] H 180 mm
Ultimate [factored] moment resistance ΦMn
Ultimate [factored] shear Strength øVn
CM10
CM20
CM30
CM40
Suitable Slab Thickness
units
180 mm
kNm/m
-22.5
-28.4
-34.0
-39.7
Concrete Strength ≥ 27.5 MPa [4,000 psi]
[7"]
[7"]
[kip-ft/ft]
[-5.1]
[-6.4]
[-7.7]
[-8.9]
190 mm
190 mm
kNm/m
-25.0
-31.7
-37.8
-44.1
[7 1/2"]
[7 1/2"]
[kip-ft/ft]
[-5.7]
[-7.1]
[-8.6]
[-9.9]
200 mm
200 mm
kNm/m
-27.6
-34.8
-41.7
-48.6
[8"]
[8"]
[kip-ft/ft]
[-6.2]
[-7.8]
[-9.4]
[-10.9]
210 mm
210 mm
kNm/m
-30.1
-38.0
-45.5
-53.0
[8 1/4"]
[8 1/2"]
[kip-ft/ft]
[-6.8]
[-8.5]
[-10.3]
[-11.9]
220mm
220 mm
kNm/m
-32.6
-41.2
-49.3
-57.5
[8 5/8"]
[8 3/4"]
[kip-ft/ft]
[-7.3]
[-9.3]
[-11.1]
[-12.9]
230 mm
230 mm
kNm/m
-35.1
-44.4
-53.1
-61.9
[9"]
[9"]
[kip-ft/ft]
[-7.9]
[-10.0]
[-12.0]
[-13.9]
240 mm
240 mm
kNm/m
-37.7
-47.5
-57.0
-66.4
[9 1/2"]
[9 1/2"]
[kip-ft/ft]
[-8.4]
[-10.7]
[-12.8]
[-14.9]
250 mm
250 mm
kNm/m
-40.2
-50.6
-60.8
-70.9
[9 7/8"]
[10"]
[kip-ft/ft]
[-9.0]
[-11.4]
[-13.7]
[-15.9]
"180 -250 mm
–
kN/m
-52.5
-52.5
-52.5
-52.5
[7" - 9 7/8"]
–
[kips/ft]
[-3.6]
[-3.6]
[-3.6]
[-3.6]
CM10
CM20
CM30
CM40
CM
Products
Schöck Isokorb® type
Product selection table as per ACI 318-11 Concrete cover CC = 55 mm [2 3/16"] Schöck Isokorb® type Concrete cover Isokorb® height CC = 55 mm [2 3/16"] H
Suitable Slab Thickness
units
200 mm
kNm/m
-24.6
-31.0
-37.2
-43.4
[8"]
[8"]
[kip-ft/ft]
[-5.5]
[-7.0]
[-8.4]
[-9.8]
210 mm
210 mm
kNm/m
-27.0
-34.0
-40.8
-47.6
[8 1/4"]
[8 1/2"]
[kip-ft/ft]
[-6.0]
[-7.7]
[-9.2]
[-10.7]
220mm
220 mm
kNm/m
-29.4
-37.0
-44.4
-51.8
[8 5/8"]
[8 3/4"]
[kip-ft/ft]
[-6.6]
[-8.4]
[-10.0]
[-11.7]
230 mm
230 mm
kNm/m
-31.8
-40.0
-48.0
-56.1
200 mm
Ultimate [factored] moment resistance ΦMn
Ultimate [factored] shear Strength øVn
Concrete Strength ≥ 27.5 MPa [4,000 psi]
[9"]
[9"]
[kip-ft/ft]
[-7.1]
[-9.0]
[-10.8]
[-12.6]
240 mm
240 mm
kNm/m
-34.2
-43.0
-51.6
-60.3
[9 1/2"]
[9 1/2"]
[kip-ft/ft]
[-7.7]
[-9.7]
[-11.6]
[-13.6]
250 mm
250 mm
kNm/m
-36.6
-46.0
-55.2
-64.5
[9 7/8"]
[10"]
[kip-ft/ft]
[-8.2]
[-10.4]
[-12.4]
[-14.5]
180 -250 mm
–
kN/m
-52.5
-52.5
-52.5
-52.5
[7" - 9 7/8"]
–
kips/ft
[-3.6]
[-3.6]
[-3.6]
[-3.6]
For Sl: 1 inch = 25.4 mm, 1 lbf = 4.448 N, 1 psi = 0.006897MPa For pound-inch units: 1 mm = 0.03937 inches, 1 N = 0.2248 lbf, 1 MPa = 145.0 psi Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
77
Schöck Isokorb® C-line type CM Cast-in-place reinforcement
The cast-in-place reinforcement, is defined by the Engineer of Record (EOR) of the building in accordance with structural requirements. The tension bars of the Schöck Isokorb® type CM must be overlapped with the tensile reinforcement (Pos. 1). Positions 2 (longitudinal edge reinforcement), Pos. 3 (U-Bars) and Pos. 4 (U-Bars for the free balcony edges) must also be provided. Following is a suggestion for the reinforcement layout. Cross-section f'c ≥ 27.5 MPa (4,000 psi) Balcony Pos. 1
CM
A
Pos. 6
Pos. 2
Pos. 3
Pos. 3
Pos. 5 Upper balcony reinforcement (EOR)
A
Pos. 6
Upper slab reinforcement (EOR)
Pos. 1
Pos. 6
Pos. 5
Pos. 6
Pos. 3
Products
f'c ≥ 27.5 MPa (4,000 psi) Interior Slab Pos. 1
Pos. 2
Pos. 2
Pos. 3
≥ 410 mm [1'-4 1/8"]
≥ 410 mm [1'-4 1/8"]
Pos. 6
Pos. 6
Lower balcony reinforcement (EOR)
Pos. 5 Lower slab reinforcement (EOR)
Cross section of recommended slab reinforcement (supplied by building contractor)
Plan View
Section A-A (Free edge) Tension bars, Isokorb® Shear force bars, Isokorb®
Pos. 1
Interior Slab
Pos. 6
A
A
type CM Balcony
Pos. 4 Pressure bearings, Isokorb® Upper reinforcement (EOR)
Pos. 3 Pos. 5 Pos. 1
Pos. 6
Pos. 4
Lower reinforcement (EOR)
Pos. 5
Section A-A Depiction of free balcony edge
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Schöck Isokorb® C-line type CM
Cast-in-place reinforcement, indirect support Suggestion for cast-in-place connective reinforcement for 100% design strength with minimum concrete strength of 27.5 MPa [4,000 psi]. The existing slab reinforcement can be taken into account for the required reinforcement of connections with Schöck Isokorb®.
Schöck Isokorb® type
Units
CM10
CM20
CM30
CM40
mm² / 1.0 m width
680
910
1130
1360
Pos 1: Overlapping reinforcement Required cross-section area as [in² / 1.0 ft width]
[in² / 1.0 ft width]
Alternative 1 Alternative 2
[0.32]
[0.43]
[0.53]
[0.64]
#4 @ 150 mm
#4 @ 125 mm
#4 @ 100 mm
#5 @ 125 mm
[#4 @ 6"]
[#4 @ 5"]
[#4 @ 4"]
[#5 @ 5"]
#5 @ 250 mm
#5 @ 200 mm
#5 @ 150 mm
#6 @ 200 mm
[#5 @ 10"]
[#5 @ 8"]
[#5 @ 6"]
[#6 @ 8"]
CM
Required lap splice length Pos.1 Minimum [in]
mm
562
562
562
562
[in]
[22"]
[22"]
[22"]
[22"]
mm
700
700
700
700
[in]
[27 1/2"]
[27 1/2"]
[27 1/2"]
[27 1/2"]
Alternative 1
4 x #3
4 x #3
4 x #3
4 x #3
Alternative 2
4 x #5
4 x #5
4 x #5
4 x #5
#3 @ 300 mm
#3 @ 300 mm
#3 @ 250 mm
#3 @ 200 mm
provided by Schöck Isokorb® [in]
Pos 3: U-Bars for the slab edges Alternative 1 Alternative 2
[#3 @ 12"]
[#3 @ 12"]
[#3 @ 10"]
[#3 @ 8"]
#5 @ 350 mm
#5 @ 350 mm
#5 @ 300 mm
#5 @ 300 mm
[#5 @ 14"]
[#5 @ 14"]
[#5 @ 12"]
[#5 @ 12"]
Pos 4: U-Bars for the free balcony edge Required cross-section area as
mm² / 1.0 m width [in² / 1.0 ft width]
In accordance with EOR specifications
Pos 5: Reinforcement bottom layer Required cross-section area as
mm² / 1.0 m width [in² / 1.0 ft width]
In accordance with EOR specifications
Pos 6: Longitudinal reinforcement Required cross-section area as
mm² / 1.0 m width [in² / 1.0 ft width]
Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
In accordance with EOR specifications
79
Products
Pos 2: Longitudinal edge reinforcement
Schöck Isokorb® C-line type CM
Cast-in-place reinforcement, indirect support Notes:
Products
CM
— Pos. 1 must run as close as possible to the thermal insulation at both sides of the Schöck Isokorb®, taking the required concrete cover into consideration. — Pos. 4 should be chosen such that the U-bars can be arranged between the legs of Pos. 3. — All free edges must be bordered using structural U-bars as per Engineer of Record (EOR) specifications. — The centerline distance of any pressure element from any free concrete edge, including expansion joints, must be at least 50 mm [2"]. — The centerline distance of any tension or shear bar from any free concrete edge, including expansion joints, must be at least 50 mm [2"]. — The lap splice length provided by Schöck Isokorb® = the length of the tension bar from the face of the Isokorb® to the free end - Concrete Cover (CC).
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Schöck Isokorb® C-line type CM Deformation/camber
The deformation values in the table (tan α [%]) result from the deformation of the Schöck Isokorb® under service loads. They are used to estimate the required camber. The mathematical camber of the balcony slab formwork results from the deflection as per ACI 381-11 plus the deformation w2 from the Schöck Isokorb®. The camber of the balcony slab formwork to be specified by the Engineer of Record (EOR) in the design drawings (e.g. calculated overall deformation from balcony slab w1 + interior slab angle of rotation + Schöck Isokorb® w2) should be rounded such that the planned drainage direction is achieved (e.g. round up for drainage towards building façade; round down for drainage towards end of cantilever slab). The given equation and tan α values are for the service load case (1.0DL + 1.0LL). The designing engineer should also consider additional long term deflections as per ACI 381-11 . Deformation (w2) as a result of Schöck Isokorb®
1.0 DL
× 1 100
CM
1.0 LL Support
H
tan α = obtain value from table below ℓ = Cantilever length [in] M = Nominal (unfactored) moment resistance [kip-ft/ft] The load combination to be used here is defined by the Engineer of Record (EOR). M = Ultimate (factored) moment resistance [kip-ft/ft] of the ø n Schöck Isokorb® type CM (see page 77).
CC
1.0 DL
h
w2 [in] = tan α × ℓ ×
M M ø n 1.5
100 mm [3 15/16"]
ℓ
Products
Deformation factors tan α Concrete cover CC = 40 mm Schöck Isokorb® type
Deformation factors tan α CC = 40 mm [1 9/16"]
CM10
CM20
CM30
CM40
Isokorb® height H 180 mm [7"]
1.1
1.1
1.1
1.1
190 mm [7 1/2"]
1.0
1.0
1.0
1.0
200 mm [7 7/8"]
0.9
0.9
0.9
0.9
210 mm [8 1/4"]
0.8
0.8
0.8
0.8
220mm [8 5/8"]
0.8
0.8
0.8
0.8
230 mm [9"]
0.7
0.7
0.7
0.7
240 mm [9 1/2"]
0.7
0.7
0.7
0.7
250 mm [9 7/8"]
0.6
0.6
0.6
0.6
CM10
CM20
CM30
CM40
200 mm [7 7/8"]
1.1
1.1
1.1
1.1
210 mm [8 1/4"]
1.0
1.0
1.0
1.0
220mm [8 5/8"]
0.9
0.9
0.9
0.9
230 mm
0.8
0.8
0.8
0.8
240 mm [9 1/2"]
0.8
0.8
0.8
0.8
250 mm [9 7/8"]
0.7
0.7
0.7
0.7
Deformation factors tan α CC = 55 mm [2 3/16"] Schöck Isokorb® type
Deformation factors tan α CC = 55 mm [2 3/16"] Isokorb® height H
Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
81
Schöck Isokorb® C-line type CM
Checklist for Professional Engineer for signing and sealing
Products
CM
~
Has the recommended maximum cantilever length for the selected height of the Schöck Isokorb® been taken into consideration?
~
Has the system cantilever length "ℓ" used for the design?
~
Have the factored member forces at the Schöck Isokorb® connection been determined at design level?
~
Has the critical concrete strength been taken into consideration in the choice of design table?
~
Has an appropriate concrete cover been selected and used with the calculation tables?
~
Have both slabs adjacent to the Isokorb® been verified for bending and shear capacities by the Engineer of Record (EOR)?
~
Has the additional deformation as a result of the Schöck Isokorb® been taken into consideration in the deformation calculations of the overall structure?
~
Has the required camber been specified in the design drawings? Was the drainage direction taken into consideration in the camber specification?
~
Have the requirements with regard to fire protection been determined, and has the relevant suffix (-R90 or R120) been added to the Isokorb® type designation in the design drawings?
~
Has the outer corners been designed using Schöck Isokorb® type CM-CC 40 and Schöck Isokorb® type CM-CC 55.
~
Has the maximum permissible expansion gap spacing been taken into consideration for the specific slab configuration?
~
Have the horizontal loads such as those from earthquakes been taken into consideration? Additional CEQ modules may be required.
~
Has the connecting reinforcement in the balcony and interior slabs been defined by the Engineer of Record (EOR)?
~
When using type CM and fully prefabricated parts, has the cast-in-place strip of concrete (width ≥ 50 mm [2"] from pressure bearing elements) that is required to create the tight fit of the HTE pressure bearing been drawn into the design plans?
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Schöck Isokorb® C-line type CMD
CMD
Products
Schöck Isokorb® type CMD
The Schöck Isokorb® type CMD (concrete slab) is suitable for cantilevered balconies at continuous slabs with different span lengths. It transfers positive and negative moments (M, D double) and shear force.
Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
83
Schöck Isokorb® C-line type CMD Section/element arrangement
Balcony
CMD
Interior slab
Balcony
Schöck Isokorb® type CMD with steel studs, facing shell and insulation layer in between
Interior slab
Schöck Isokorb® type CMD with window wall systems
Position of Schöck Isokorb® type CMD The Schöck Isokorb® type CMD should be located in the insulating layer.
Products
Orientation of Schöck Isokorb® type CMD — — — —
Attention: the Schöck Isokorb® type CMD does not have a symmetrical design. The upper bar is above the shear force bars, and the lower bar is in the same layer as the shear force bars. Pay attention to installation orientation and show as a cross-section view on the design drawings. The Schöck Isokorb® type CMD has the same design at the balcony side and the interior slab side.
Element arrangement Plan view Interior slab Balcony Type CMD
— If the Schöck Isokorb® type CMD is used with precast concrete construction, the plans must include a cast-in-place strip of concrete (width = bar length from insulating element) for reliable anchorage.
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Schöck Isokorb® C-line type CMD Slab geometry/expansion joints Recommended maximum cantilever length The following maximum cantilever lengths "ℓ" are recommended in order to avoid excessive vibration behaviour in the balcony slab. Concrete cover for tension bars CC = 40 mm [1 9/16"]
180 mm [7"]
190 mm [7 1/2"]
200 mm [7 7/8"]
1.95 m [6'-5"]
2.1 m [6'-10"]
2.25 m [7'-4"]
max ℓ with Isokorb® height H 210 mm [8 1/4"]
220 mm [8 5/8"]
230 mm [9"]
240 mm [9 1/2"]
250 mm [9 7/8"]
2.39 m [7'-10"]
2.54 m [8'-4"]
2.68 m [8'-10"]
2.83 m [9'-3"]
2.98 m [9'-8"]
2.17 m [7'-2"]
2.32 m [7'-7"]
2.46 m [8'-0"]
2.61 m [8'-6"]
2.76 m [9'-0"]
CC = 55 mm [2 3/16"]
CMD
Cantilever length for the structural calculations The support of the balcony is assumed to be 100 mm [3 15/16"] from the Schöck Isokorb® insulating element at the interior slab side.
Interior slab H
CC
h
Balcony
100 mm [3 15/16"]
ℓ
Products
Expansion joints (recommended balcony length) The expansion joint spacing shown below corresponds to a temperature difference of ∆T = 70 °C [126 °F].
Maximum expansion joint spacing e [m] ≤ 11,30 m [37'-0 ≤ e7/8"]
type CMD
Schöck dowel type ESD
Expansion joint Expansion joint type CMD
l
Schöck dowel type ESD
type CMD
Schöck Isokorb® type CMD maximum expansion joint spacing e
Note: — The maximum expansion joint spacing must be verified by the Engineer of Record (EOR). — The expansion joint must be free to deform in the longitudinal direction. Schöck Dorn ESD-K in stainless steel A4 would be suitable.
Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
85
Schöck Isokorb® C-line type CMD Concrete cover/type designation Concrete cover The concrete cover of the Schöck Isokorb® type CMD is set to 40 mm [1 9/16"] (CC40) or 55 mm [2 3/16"] (CC55) from below and above. We recommend choosing the CC55 concrete covering for balcony slabs with a tilted surface. This allows the surface of the balcony slab to be inclined by 2%. Interior slab
CMD 80 mm [3 1/8"]
ℓ
h
H
40 mm [1 9/16"]
Balcony
100 mm [3 15/16"]
≥ 40 mm [1 9/16"]
Balcony
55 mm [2 3/16"]
Concrete cover CC with level balcony slab
h
H
Products
≤2%
Interior slab
ℓ
H
100 mm [3 15/16"] h
80 mm [3 1/8"]
CC
Support
100
ℓ
Concrete cover CC with sloped balcony slab Schöck Isokorb® type
Concrete Strength ≥ 30MPa
Type designation in design drawings
Concrete cover CC = 40 mm
The following type designation specifies the Schöck Isokorb® type that is required. The type designation is indicated on the design drawings. The type designation is printed on the sticker of the Schöck Isokorb® type as a recognition feature.
Isokorb® height H [mm]
CMD10
CMD20
180
19.4
25.8
32.3
190
21.6
28.8
36.0
Ultimate (factored) moment resistance Mr[kNm/m]
200
23.8
31.7
39.6
210
26.0
34.7
43.3
220
28.2
37.6
47.0
230
30.4
40.5
50.7
240
32.6
43.5
54.3
Balcony
Type designation in design drawings
With fire protection
CMD30
Interior slab
CC = 40 mm [1 9/16"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"]
CC
CMD20-CC40-H200-R90
H
Type/load capacity Concrete cover Isokorb® height Fire protection 86
CC 740 mm [2'-5 1/8"]
H = 200 mm [7 7/8"]
— Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012 — —
Schöck Isokorb® C-line type CMD Product cross-section Balcony
Interior slab 740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"] 40 mm [1 9/16"] H 40 mm [1 9/16"]
447 mm
447 mm
[1'-5 5/8"]
[1'-5 5/8"]
H = 180 - 250 mm [7 1/16"] - [9 13/16"]
CMD
Product cross-section for Schöck Isokorb® type CMD10 to CMD40, concrete cover CC40
Balcony
Interior slab 740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"] 55 mm [2 3/16"] H 55 mm [2 3/16"] 447 mm
[1'-5 5/8"]
[1'-5 5/8"]
H = 210 - 250 mm [8 1/4"] - [9 13/16"]
Products
447 mm
Product cross-section for Schöck Isokorb® type CMD10 to CMD40, concrete cover CC55
Schöck Isokorb® length and configuration Schöck Isokorb® type
CMD10
CMD20
CMD30
CMD40
Isokorb® length [m]
1.0 [3'-3"]
1.0 [3'-3"]
1.0 [3'-3"]
1.0 [3'-3"]
Tension/compression bars
2 x 6 ø 12
2 x 8 ø 12
2 x 10 ø 12
2 x 12 ø 12
Shear force bars
4 ø 8+4 ø 8
4 ø 8+4 ø 8
4ø8+4ø8
4ø8+4ø8
Note: — The product cross-sections of the 4 load capacities (CMD10, CMD20, CMD30, CMD40) of the Schöck Isokorb® type CM are identical for the respective concrete cover. The load capacities of the Schöck Isokorb® type CMD vary in the number of tension bars amd shear force bars. — The spacer bar, see the following page at the overhead view of the products, is used for structural position anchoring and may only be removed at the construction site after inserting the Schöck Isokorb®. — The Schöck Isokorb® type CMD may be split at the non-reinforced locations. The spacing of the pressure elements from the free edge of the reinforced concrete slab must be at least 50 mm [2"], and the axis spacing of the shear force bars must be at least 100 mm [4"] and no more than 150 mm [6"]. — The Schöck Isokorb® consists of metric components. — reinforcement bars ø 8 correspond to 5/16" — reinforcement bars ø 12 correspond to 1/2"
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87
Schöck Isokorb® C-line type CMD Overhead view of product
Balcony
Interior slab
50 mm [1 15/16"]
77 mm [3 1/16"]
200 mm [7 7/8"] 340 mm [1'-1 3/8"] 200 mm [7 7/8"]
160 mm [6 5/16"]
1000 mm [3'-3 3/8"] 100 mm [3 15/16"]
CMD 200 mm [7 7/8"] 340 mm [1'-1 3/8"] 200 mm [7 7/8"] 83 mm [3 1/4"]
Products
50 mm [1 15/16"] 447 mm
447 mm
[1'-5 5/8"]
[1'-5 5/8"]
740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"]
Overhead view of Schöck Isokorb® type CMD10 product
Balcony
Interior slab
50 mm [1 15/16"]
77 mm [3 1/16"]
100 mm [3 15/16"]
340 mm [1'-1 3/8"]
200 mm [7 7/8"]
100 mm [3 15/16"] 160 mm [6 5/16"]
1000 mm [3'-3 3/8"] 100 mm [3 15/16"] 100 mm [3 15/16"]
340 mm [1'-1 3/8"]
200 mm [7 7/8"]
100 mm [3 15/16"] 83 mm [3 1/4"]
50 mm [1 15/16"] 447 mm
447 mm
[1'-5 5/8"]
[1'-5 5/8"]
740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"]
Overhead view of Schöck Isokorb® type CMD20 product
88
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Schöck Isokorb® C-line type CMD Overhead view of product
Balcony
Interior slab
50 mm [1 15/16"]
77 mm [3 1/16"]
100 mm [3 15/16"] 100 mm [3 15/16"] 340 mm [1'-1 3/8"] 100 mm [3 15/16"] 100 mm [3 15/16"] 160 mm [6 5/16"]
1000 mm [3'-3 3/8"] 100 mm [3 15/16"]
CMD
100 mm [3 15/16"] 100 mm [3 15/16"] 340 mm [1'-1 3/8"] 100 mm [3 15/16"] 100 mm [3 15/16"] 83 mm [3 1/4"]
50 mm [1 15/16"] 447 mm
447 mm
[1'-5 5/8"]
[1'-5 5/8"] 740 mm [2'-5 1/8"]
80 mm [3 1/8"]
Products
740 mm [2'-5 1/8"] Overhead view of Schöck Isokorb® type CMD30 product
Balcony
Interior slab
50 mm [1 15/16"]
77 mm [3 1/16"]
100 mm [3 15/16"] 50 mm [1 15/16"] 50 mm [1 15/16"]
340 mm [1'-1 3/8"]
100 mm [3 15/16"] 100 mm [3 15/16"] 160 mm [6 5/16"]
1000 mm [3'-3 3/8"] 100 mm [3 15/16"] 100 mm [3 15/16"] 100 mm [3 15/16"]
340 mm [1'-1 3/8"]
50 mm [1 15/16"] 50 mm [1 15/16"] 100 mm [3 15/16"]
83 mm [3 1/4"]
50 mm [1 15/16"] 447 mm
447 mm
[1'-5 5/8"]
[1'-5 5/8"]
740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"]
Overhead view of Schöck Isokorb® type CMD40 product Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
89
Schöck Isokorb® C-line type CMD Design
The support is assumed to be 100 mm [4"] from the Schöck Isokorb® insulating element at the interior slab side.
±
V M
H
CC
h
Support
l
100 mm [3 15/16"]
CMD
Notes With different balcony slab, the weaker and floor slab concrete should be used with the tables above. The Engineer of Record (EOR) must confirm strength of the slabs attached at both sides of the Schöck Isokorb®. The shear capacity of the slabs must be verified by the Engineer of Record (EOR). For seismic load case please contact Schöck Design Department. The capacities are considering a maximum permitted bar separation according to ACI 318-11. This has to be taken into account by the Engineer of Record (EOR).
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Products
— — — — —
Schöck Isokorb® C-line type CMD Design
Product Selection Table as per ACI 318-11 for non-seismic load case CMD10
Concrete cover Isokorb® height Suitable Slab CC = 40 mm [1 9/16"] mm [in] Thickness
Ultimate (factored) Moment Resistance ΦMn
Ultimate (factored) Shear Strength øVn
Units
CMD20
CMD30
CMD40
Concrete Strength ≥ 27.5 Mpa (4,000 psi)
180 mm
180 mm
kNm/m
±21.6
±28.7
±35.9
±43.1
[7"]
[7"]
[kip-ft/ft]
[±4.8]
[±6.5]
[±8.1]
[±9.7]
190 mm
190 mm
kNm/m
±24.1
±32.0
±40.0
±48.1
[7 1/2"]
[7 1/2"]
[kip-ft/ft]
[±5.4]
[±7.2]
[±9.0]
[±10.8]
200 mm
200 mm
kNm/m
±26.6
±35.4
±44.2
±53.1
[8"]
[8"]
[kip-ft/ft]
[±5.9]
[±8.0]
[±10.0]
[±11.9]
210 mm
210 mm
kNm/m
±29.0
±38.7
±48.4
±58.1
[8 1/4"]
[8 1/2"]
[kip-ft/ft]
[±6.5]
[±8.7]
[±10.9]
[±13.0]
220mm
220 mm
kNm/m
±31.5
±42.1
±52.5
±63.0
[8 5/8"]
[8 3/4"]
[kip-ft/ft]
[±7.1]
[±9.5]
[±11.8]
[±14.1]
230 mm
230 mm
kNm/m
±34.0
±45.4
±56.7
±68.0
[9"]
[9"]
[kip-ft/ft]
[±7.6]
[±10.2]
[±12.7]
[±15.3]
240 mm
240 mm
kNm/m
±36.5
±48.8
±60.8
±72.1
[9 1/2"]
[9 1/2"]
[kip-ft/ft]
[±8.2]
[±10.9]
[±13.6]
[±16.4]
250 mm
250 mm
kNm/m
±39.0
±52.1
±65.0
±78.0
[9 7/8"]
[10"]
[kip-ft/ft]
[±8.8]
[±11.7]
[±14.6]
[±17.5]
"180 -250 mm
–
kN/m
±52.5
±52.5
±52.5
±52.5
[7" - 9 7/8"]
–
kips/ft
[±3.6]
[±3.6]
[±3.6]
[±3.6]
CMD20
CMD30
CMD40
CMD
Products
Schöck Isokorb® type
Product Selection Table as per ACI 318-11 for non seismic load case Schöck Isokorb® type Concrete cover CC = 55 mm [2 3/16"]
Ultimate (factored) Moment Resistance ΦMn
Ultimate (factored) Shear Strength ΦVn
CMD10
Isokorb® height H
Suitable Slab Thickness
210 mm
210 mm
kNm/m
±22.0
±29.2
±36.6
±43.7
[8 1/4"]
[8 1/2"]
[kip-ft/ft]
[±4.9]
[±6.6]
[±8.2]
[±9.8]
220mm
220 mm
kNm/m
±24.5
±32.5
±40.8
±48.7
[8 5/8"]
[8 3/4"]
[kip-ft/ft]
[±5.5]
[±7.3]
[±9.1]
[±10.9]
230 mm
230 mm
kNm/m
±27.0
±35.8
±44.9
±53.8
[9"]
[9"]
[kip-ft/ft]
[±6.1]
[±8.0]
[±10.1]
[±12.0]
240 mm
240 mm
kNm/m
±29.4
±39.2
±49.1
±58.8
Units
Concrete Strength ≥ 27.5 Mpa (4,000 psi)
[9 1/2"]
[9 1/2"]
[kip-ft/ft]
[±6.6]
[±8.8]
[±11.0]
[±13.2]
250 mm
250 mm
kNm/m
±31.9
±42.6
±53.2
±63.8
[9 7/8"]
[10"]
[kip-ft/ft]
[±7.2]
[±9.6]
[±12.0]
[±14.3]
180 -250 mm
–
kN/m
±52.5
±52.5
±52.5
±52.5
[7" - 9 7/8"]
–
kips/ft
[±3.6]
[±3.6]
[±3.6]
[±3.6]
For Sl: 1 inch = 25.4 mm, 1 lbf = 4.448 N, 1 psi = 0.006897MPa For pound-inch units: 1 mm = 0.03937 inches, 1 N = 0.2248 lbf, 1 MPa = 145.0 psi
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91
Schöck Isokorb® C-line type CMD Cast-in-place reinforcement
The cast-in-place reinforcement is defined by the Engineer of Record (EOR) in accordance with structural requirements. The tension bars of the Schöck Isokorb® type CMD must be overlapped with the tensile reinforcement (Pos. 1). Positions 2 (Longitudinal edge Reinforcement), Pos. 3 (U-Bars) and Pos. 4 (U-bars for the free balcony edge) must also be provided. The following is a suggestion for the reinforcement. Cross-section f'c ≥ 27.5 MPa (4,000 psi) Balcony Pos. 1
A
Pos. 6
Pos. 2
Pos. 3
Pos. 3
Pos. 5 Upper balcony reinforcement (EOR)
Pos. 3 Pos. 1
A
Pos. 6
Upper slab reinforcement (EOR)
Pos. 6
Pos. 5
Pos. 6
Pos. 3
Products
f'c ≥ 27.5 MPa (4,000 psi) Interior Slab Pos. 1
Pos. 2
Pos. 2
Pos. 3
≥ 410 mm [1'-4 1/8"]
≥ 410 mm [1'-4 1/8"]
Pos. 6
Pos. 6 Pos. 5
Lower balcony reinforcement (EOR)
Lower slab reinforcement (EOR) Cross section of recommended cast-in-place reinforcement (supplied by building contractor)
Section A-A (Free edge)
Plan View
Tension bars, Isokorb® Shear force bars, Isokorb®
Pos. 1
Interior Slab
Pos. 6
A
A
type CMD Balcony
Pos. 4
Pos. 3 Pos. 5
Upper reinforcement (EOR)
Pos. 1
Pos. 6
Pos. 4
Lower reinforcement (EOR)
Pos. 5
Section A-A Depiction of free balcony edge
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Schöck Isokorb® C-line type CMD
Cast-in-place reinforcement, indirect support Suggestion for cast-in-place connective reinforcement For 100% section strength with minimum concrete strength of 27.5 MPa [4,000 psi]. The existing slab reinforcement can be taken into account for the required reinforcement of connections with Schöck Isokorb®. Schöck Isokorb® type
Units
CMD10
CMD20
CMD30
CMD40
mm² / 1.0 m width
680
910
1130
1360
Pos 1: Overlapping reinforcement Required cross-section area as
[in² / 1.0 ft width]
[0.32]
[0.43]
[0.53]
[0.64]
#4 @ 150 mm
#4 @ 125 mm
#4 @ 100 mm
#5 @ 125 mm
[#4 @ 6"]
[#4 @ 5"]
[#4 @ 4"]
[#5 @ 5"]
#5 @ 250 mm
#5 @ 200 mm
#5 @ 150 mm
#6 @ 200 mm
[#5 @ 10"]
[#5 @ 8"]
[#5 @ 6"]
[#6 @ 8"]
mm
562
562
562
562
Alternative 1 Alternative 2 Required lap splice length Pos.1 Minimum [in]
(in)
[22"]
[22"]
[22"]
[22"]
mm
700
700
700
700
(in)
[27 1/2"]
[27 1/2"]
[27 1/2"]
[27 1/2"]
Alternative 1
4 x #3
4 x #3
4 x #3
4 x #3
Alternative 2
4 x #5
4 x #5
4 x #5
4 x #5
#3 @ 250 mm
#3 @ 250 mm
#3 @ 250 mm
#3 @ 250 mm
[#3 @ 10"]
[#3 @ 10"]
[#3 @ 10"]
[#3 @ 10"]
#5 @ 350 mm
#5 @ 350 mm
#5 @ 350 mm
#5 @ 350 mm
[#5 @ 14"]
[#5 @ 14"]
[#5 @ 14"]
[#5 @ 14"]
provided by Schöck Isokorb® [in]
Pos 3: U-Bars for the slab edges Alternative 1 Alternative 2 Pos 4: U-Bars for the free balcony edge Required cross-section area as
mm² / 1.0 m width [in² / 1.0 ft width]
In accordance with EOR specifications
Pos 5: Reinforcement bottom layer Required cross-section area as
mm² / 1.0 m width [in² / 1.0 ft width]
In accordance with EOR specifications
Pos 6: Longitudinal reinforcement Required cross-section area as
mm² / 1.0 m width [in² / 1.0 ft width]
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In accordance with EOR specifications
93
Products
Pos 2: Longitudinal edge reinforcement
Schöck Isokorb® C-line type CMD
Cast-in-place reinforcement, indirect support Notes:
Products
CMD
— Pos. 1 must run as close as possible to the thermal insulation at both sides of the Schöck Isokorb®, taking the required concrete cover into consideration. — Pos. 4 should be chosen such that the U-bars can be arranged between the legs of Pos. 3. — All free edges must be bordered using structural U-bars as per Engineer of Record (EOR) specifications. — The spacing of the tension/pressure bars from the free edge or the expansion gap must be at least 50 mm [2"]. — The centerline distance of any pressure element from any free concrete edge, including expansion joints, must be at least 50 mm [2"]. — The centerline distance of any tension or shear bar from any free concrete edge, including expansion joints, must be at least 50 mm [2"]. — The lap splice length provided by Schöck Isokorb® = the length of the tension bar from the face of the Isokorb® to the free end - Concrete Cover (CC).
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Schöck Isokorb® C-line type CMD Deformation/camber
The deformation values in the table (tan α [%]) result from the deformation of the Schöck Isokorb® under service loads. They are used to estimate the required camber. The mathematical camber of the balcony slab formwork results from the deflection as per ACI 318-11 plus the deformation w2 from the Schöck Isokorb®. The camber of the balcony slab formwork to be specified by the Engineer of Record (EOR) in the design drawings (e.g., calculated overall deformation from balcony slab w1 + interior slab angle of rotation + Schöck Isokorb® w2) should be rounded such that the planned drainage direction is achieved (e.g. round up for drainage towards building façade, round down for drainage towards end of cantilever slab). The given equation and tan α values are for the service load case (1.0DL + 1.0LL). The designing engineer should also consider additional long term deflections as per ACI 318-11. Deformation (w2) as a result of Schöck Isokorb®
1.0 DL
1 100
Support
H
CC
1.0 DL
100 mm [3 15/16"]
ℓ
Products
tan α = Insert value from table below ℓ = Cantilever length [in] M = Nominal (unfactored) moment resistance [kip-ft/ft] The load combination to be used here is defined by the Engineer of Record (EOR). ΦMn = Ultimate (factored) moment resistance [kip-ft/ft] of the Schöck Isokorb® type CMD (see page 91).
Schöck Isokorb® type
Deformation factors tan α CC = 40 mm [1 9/16"]
CMD
1.0 LL
h
w2 [in] = tan α × ℓ ×
M × ΦMn 1.5
CMD10
CMD20
CMD30
CMD40
180 mm [7"]
1.1
1.1
1.1
1.1
190 mm [7 1/2"]
1.0
1.0
1.0
1.0
200 mm [7 7/8"]
0.9
0.9
0.9
0.9
210 mm [8 1/4"]
0.8
0.8
0.8
0.8
220mm [8 5/8"]
0.8
0.8
0.8
0.8
230 mm [9"]
0.7
0.7
0.7
0.7
240 mm [9 1/2"]
0.7
0.7
0.7
0.7
250 mm [9 7/8"]
0.6
0.6
0.6
0.6
CMD10
CMD20
CMD30
CMD40
210 mm [8 1/4"]
1.1
1.1
1.1
1.1
220mm [8 5/8"]
1.0
1.0
1.0
1.0
Isokorb® height H
Schöck Isokorb® type
Deformation factors tan α CC = 55 mm [2 3/16"] Isokorb® height H
230 mm
0.9
0.9
0.9
0.9
240 mm [9 1/2"]
0.8
0.8
0.8
0.8
250 mm [9 7/8"]
0.8
0.8
0.8
0.8
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95
Schöck Isokorb® C-line Type CMD Checklist
Products
CMD
~
Has the recommended maximum cantilever length for the selcted height of the Schöck Isokorb® been taken into consideration?
~
Has the system cantilever length (i.e., "ℓ"] been used for the design?
~
Have the factored member forces at the Schöck Isokorb® connection been determined at design level?
~
Has the critical concrete strength been taken into consideration in the choice of design table?
~
Has an appropriate concrete cover been selected and used with the calculation tables?
~
Have both slabs adjacent to the Isokorb® been verified for bending and shear capacities by the Engineer of Record (EOR)?
~
Has the additional deformation as a result of the Schöck Isokorb® been taken into consideration in the deformation calculations of the overall structure?
~
Has the required camber been specified in the design drawings? Was the drainage direction taken into consideration in the camber specification?
~
Have the requirements with regard to fire protection been determined, and has the relevant suffix (-R90 or R120) been added to the Isokorb® type designation in the design drawings?
~
Has the maximum permissible expansion gap spacing been taken into consideration for the specific slab configuration?
~
Has the connecting reinforcement in the balcony and interior slabs been defined by the Engineer of Record (EOR)?
~
Has the cast-in-place strip of concrete that is needed for reliable anchorage (width = bar length starting at insulating element) been included in the design drawings for the type CMD in the case of precast building construction?
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Schöck Isokorb® C-line type CV
CV
Products
Schöck Isokorb® type CV
The Schöck Isokorb® type CV is suitable for supported reinforced concrete slabs. (C for concrete slab) It transmits positive shear force (vertical shear).
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97
Schöck Isokorb® C-line type CV Section/element arrangement
Balcony
CV
Balcony
Interior slab
Schöck Isokorb® type CV, supported balcony with window wall systems
Interior slab
Schöck Isokorb® type CV, supported balcony, steel studs, facing shell and insulation layer in between
Position of Schöck Isokorb® type CV The Schöck Isokorb® type CV should be located in the insulating layer.
Products
Orientation of the Schöck Isokorb® type CV Attention: the Schöck Isokorb® type CV does not have a symmetrical design. — The lower distance between the shear force bars and the insulating element at the bottom edge is always 40 mm [1 9/16"]. The upper distance can vary. — Pay attention to installation orientation and show a cross-section view on the design drawings. — The Schöck Isokorb® type CV has the same design at the balcony side and the interior slab side.
Element arrangement
CEQ
Interior slab Balcony
Balcony
Type CV
Support
Interior slab
Type CV
Support
Support
Schöck Isokorb® type CV, balcony supported without planned horizontal load or earthquake load.
Support
Schöck Isokorb® type CV, balcony supported with planned horizontal load or earthquake load.
Note: — For designed horizontal loads and earthquake loads, the Schöck Isokorb® CEQ module must be used. With horizontal tensile forces at right angles to the outside wall greater than the existing shear force, the Schöck Isokorb® CEQ module must also be used.
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Schöck Isokorb® C-line type CV
Slab geometry/span length/expansion joints Recommended maximum span length The maximum span length results from the factored shear force Vf.
Span length for the structural calculations The support of the balcony is assumed to be 100 mm [4"] from the Schöck Isokorb® insulating element at the interior slab side.
Balcony
Interior slab
l
100 mm [3 15/16"]
CC
h
H
CV
Expansion joints (recommended balcony length)
≤ 5.65 m [18'-6 7/16"]
type CV
Schöck dowel type ESD
Schöck dowel type ESD
Expansion joint
Expansion joint type CV
type CV
type CV
Support
type CV
≤ 5.65 m
≤ 11.30 m [37'-0 7/8"]
[18'-6 7/16"]
≤ 5.65 m [18'-6 7/16"]
Products
The expansion joint spacing shown below corresponds to a temperature difference of ∆T = 70 °C [126 °F].
l
Schöck Isokorb® type CV, expansion joint arrangement
Note: — The maximum expansion joint spacing must be verified by the Engineer of Record (EOR). — The spacing of the pressure elements from the free edge of the expansion joint must be at least 50 mm [2"], and the spacing of the shear force bars must be at least 100 mm [4"] and no more than 150 mm [6"]. — The expansion joint must be free to deform in the longitudinal direction, for which we recommend the A4 stainless steel Schöck Dorn ESD-K, for example.
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99
Schöck Isokorb® C-line type CV Concrete cover/type designation Concrete cover CC The concrete cover of the Schöck Isokorb® type CV is set to 40 mm [1 9/16"] (CC40) from below. The concrete cover is always greater than 40 mm [1 9/16"] if the minimum slab thickness is complied with.
Balcony
Interior slab
H
CV
hmin
≥ 40 mm [1 9/16"]
40 mm [1 9/16"] 80 mm [3 1/8"]
ℓ
100 mm [3 15/16"]
Concrete cover without sloping balcony slab
Minimum slab thickness
Minimum slab height hmin
ℓ
180 mm [7"]
Isokorb® height H [mm]
Type/load capacity Concrete cover Isokorb® height Fire protection
100
180 mm [7"]
CV10
Concrete covering CC40 [mm]
— — —
— —
CV20 Concrete strength ≥ 30 MPa
180-210
40.8
54.4
220
38.4
51.2
230
33.3
44.4
240
29.4
39.2
250
26.3
35.1
180
180
Slab thickness hmin [mm]
—
CV20-CC40-H200-R120
CV30
100
Schöck Isokorb® type Ultimate (factored) shear resistance, Vr [kN/m]
The following type designation specifies the Schöck Isokorb® type that is required. The type designation is indicated on design drawings. The type designation is printed on the sticker of the Schöck Isokorb® type as a recognition feature.
Type designation in design drawings
CV20
180 mm [7"]
Type designation in design drawings
with fire protection
H
CV10
CC
Schöck Isokorb® type
hmin
Products
Support The following minimum slab thicknesses hmin must be complied with depending on the load capacity.
Balcony
Interior slab
CC = ≥ 40 mm ≥ [1 9/16"]
80 mm [3 1/8"]
447 mm [1'-5 5/8"]
CC H CC 447 mm [1'-5 5/8"]
H = 200 mm [7 7/8"]
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Schöck Isokorb® C-line type CV Product cross-section Balcony
Interior slab 347 mm [1'-1 11/16"]
80 mm [3 1/8"]
347 mm [1'-1 11/16"] ≥ 45 mm [1 3/4"] H 40 mm [1 9/16"]
340 mm
340 mm
[1'-1 3/8"]
[1'-1 3/8"]
H = 180 - 250 mm [7 1/16"] - [9 13/16"]
CV
Product cross-section of Schöck Isokorb® type CV10 and CV20
Balcony
Interior slab 447 mm [1'-5 5/8"]
80 mm [3 1/8"]
447 mm [1'-5 5/8"] ≥ 40 mm [1 9/16"] H 40 mm [1 9/16"]
Products
H = 180 - 250 mm [7 1/16"] - [9 13/16"] Product cross-section of Schöck Isokorb® type CV30
Schöck Isokorb® length and configuration Schöck Isokorb® type
CV10
CV20
CV30
Isokorb® length [m]
1.0 [3'-3"]
1.0 [3'-3"]
1.0 [3'-3"]
180 - 250 [7" - 9 7/8"]
180 - 250 [7"-9 7/8"]
180 -250 [7"-9 7/8"]
6 ø 6+6 ø 6
8ø6+8ø6
6 ø 8+6 ø 8
4
4
4
Isokorb® height [mm] Shear force bars Pressure bearings (pcs.)
Note: — The product cross-sections of load capacities CV10 and CV20 of the Schöck Isokorb® type CV are identical. — The Schöck Isokorb® type CV may be split at the non-reinforced locations. The spacing of the pressure elements from the free edge of the reinforced concrete slab must be at least 50 mm [2"], and the spacing of the shear force bars must be at least 100 mm [4"] and no more than 150 mm [6"]. — The Schöck Isokorb® consists of metric components. — reinforcement bars ø 8 correspond to 5/16" — reinforcement bars ø 12 correspond to 1/2"
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101
Schöck Isokorb® C-line type CV Overhead view of product
Balcony
Interior slab
50 mm [1 15/16"]
100 mm [3 15/16"]
200 mm [7 7/8"] 300 mm [11 13/16"] 200 mm [7 7/8"]
1000 mm [3'-3 3/8"] 100 mm [3 15/16"]
200 mm [7 7/8"]
CV 200 mm [7 7/8"] 300 mm [11 13/16"] 200 mm [7 7/8"] 100 mm [3 15/16"]
Products
50 mm [1 15/16"] 340 mm
347 mm
[1'-1 3/8"]
[1'-1 11/16"]
347 mm [1'-1 11/16"]
80 mm [3 1/8"]
340 mm [1'-1 3/8"]
Overhead view of Schöck Isokorb® type CV10
Balcony
Interior slab
50 mm [1 15/16"]
100 mm [3 15/16"]
100 mm [3 15/16"]
200 mm [7 7/8"]
300 mm [11 13/16"]
100 mm [3 15/16"] 1000 mm [3'-3 3/8"] 100 mm [3 15/16"]
200 mm [7 7/8"]
100 mm [3 15/16"]
200 mm [7 7/8"]
300 mm [11 13/16"]
100 mm [3 15/16"] 100 mm [3 15/16"]
50 mm [1 15/16"] 340 mm
347 mm
[1'-1 3/8"]
[1'-1 11/16"]
347 mm [1'-1 11/16"]
80 mm [3 1/8"]
340 mm [1'-1 3/8"]
Overhead view of Schöck Isokorb® type CV20
102
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Schöck Isokorb® C-line type CV Overhead view of product
Balcony
Interior slab
50 mm [1 15/16"]
100 mm [3 15/16"]
100 mm [3 15/16"]
200 mm [7 7/8"]
300 mm [11 13/16"]
100 mm [3 15/16"] 1000 mm [3'-3 3/8"] 100 mm [3 15/16"]
200 mm [7 7/8"]
CV
100 mm [3 15/16"]
200 mm [7 7/8"]
300 mm [11 13/16"]
100 mm [3 15/16"] 100 mm [3 15/16"]
50 mm [1 15/16"] 80 mm [3 1/8"]
447 mm [1'-5 5/8"]
Products
447 mm [1'-5 5/8"]
Overhead view of Schöck Isokorb® type CV30
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103
Schöck Isokorb® C-line type CV Design
The support is assumed to be 100 mm [3 15/16"] from the Schöck Isokorb® insulating element at the interior slab side.
H
hmin
Support
100 mm [3 15/16"]
CC
ℓ
CV
Product selection table as per ACI 318-11w Schöck Isokorb® type
Products
Ultimate [factored) Shear Strength øVn
Isokorb® height H [mm]
Slab thickness hmin
CV10
CV20
CV30
Concrete covering CC40 mm [1 9/16"]
Suitable Slab Thickness
Units
Concrete strength ≥ 27.5 MPa [4,000 psi)
180 mm
180 mm
kN/m
45.3
59.8
78.8
[7"]
[7"]
[kips/ft)
[3.1)
[4.1)
[5.4)
190 mm
190 mm
kN/m
45.3
59.8
78.8
[7 1/2"]
[7 1/2"]
[kips/ft)
[3.1)
[4.1)
[5.4)
200 mm
200 mm
kN/m
45.3
59.8
78.8
[7 7/8"]
[8"]
[kips/ft)
[3.1)
[4.1)
[5.4)
210 mm
210 mm
kN/m
45.3
59.8
78.8
[8 1/4"]
[8 1/2"]
[kips/ft)
[3.1)
[4.1)
[5.4)
220 mm
220 mm
kN/m
45.3
59.8
78.8
[8 5/8"]
[8 3/4"]
[kips/ft)
[3.1)
[4.1)
[5.4)
230 mm
230 mm
kN/m
45.3
59.8
78.8
[9"]
[9"]
[kips/ft)
[3.1)
[4.1)
[5.4)
240 mm
240 mm
kN/m
45.3
59.8
78.8
[9 1/2"]
[9 1/2"]
[kips/ft)
[3.1)
[4.1)
[5.4)
250 mm
250 mm
kN/m
45.3
59.8
78.8
[9 7/8"]
[10"]
[kips/ft)
[3.1)
[4.1)
[5.4)
180 mm (7"]
180 mm (7"]
180 mm (7"]
Notes — With different balcony slab and floor slab concrete qualities, the weaker concrete should be used with the tables above. — The shear capacity of the slabs must be verified by the Engineer of Record (EOR). — Because of the eccentric connection, a moment occurs at the slab edges at both sides of the Schöck Isokorb® type CV. The transmission of this moment in the two connecting slabs must be verified in each individual case. — Verification for the slabs attached at both sides of the Schöck Isokorb® must be submitted by the Engineer of Record (EOR). When the reinforcement of the floor slab and the balcony slab which connect to the Schöck Isokorb® type CV is being determined, it must be assumed that there is a hinge, since the Schöck Isokorb® type CV can only transmit shear force. — For seismic loads the Schöck Isokorb® CV has to be combined with the Schöck Isokorb® type CEQ. — The capacities are considering the maximum permitted bar separation according to ACI 318-11, based on the same height of the slab and Isokorb® and a concrete cover of the interior slab of 20 mm [3/4"]. For differing boundary conditions the capacities have to be checked. 104
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Schöck Isokorb® C-line type CV
Moments from eccentric connection Deformation An estimate of the additional deformation from the Schöck Isokorb® type CV was made on the basis of component testing. In the tests, the bearing points or bearing edges were subjected to vertical deformation of approx. 0.8 to 1.0 mm [1/32" to 5/128"].
Moments from eccentric connection In order to determine the connecting reinforcement at both sides of the Schöck Isokorb® type CV, moments from an eccentric connection must also be taken into consideration. Each of these moments must be overlaid with the moments from the planned load, providing that they act in the same direction.
Vf
1/2 aV
Vf
1/2 aV
Vf
Vf Mecc, f
CV
Interior slab
Balcony
Mecc, f
Vf Vf Mecc, f = Vf × 1/2 aV
Schöck Isokorb® type ∆ Mecc,f
Units
CV10
CV20
CV30
kNm/m
1.82
2.40
3.38
[kip-ft/ft]
[0.41]
[0.54]
[0.76]
Products
Schöck Isokorb® length and configuration
Note: — These recommendations must be checked by the Engineer of Record (EOR) and modified if necessary.
1)
with max ev = 140 mm [5 1/2"]
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105
Schöck Isokorb® C-line type CV Cast-in-place reinforcement
The cast-in-place reinforcement is defined by the Engineer of Record (EOR) of the building in accordance with structural requirements. The shear force bars of the Schöck Isokorb® type CV must be overlapped with the tensile reinforcement (Pos. 1). Positions 2 (longitudinal edge reinforcement),Pos. 3 (U-Bars) and Pos. 4 (U-Bars for the free balcony edge) must also be provided. The following is a suggestion for the reinforcement layout. Cross-section f'c ≥ 27.5 MPa (4,000 psi) Balcony Pos. 1
CV
A
Pos. 6
Pos. 2
Pos. 3
Pos. 3
Pos. 5
Pos. 6
Pos. 5
A Pos. 1
Upper balcony reinforcement (EOR)
Upper slab reinforcement (EOR)
Pos. 6
Pos. 6
Pos. 3
Products
f'c ≥ 27.5 MPa (4,000 psi) Interior Slab Pos. 1
Pos. 2
Pos. 2
Pos. 3
≥ 410 mm [1'-4 1/8"]
≥ 410 mm [1'-4 1/8"]
Pos. 6
Pos. 6
Lower balcony reinforcement (EOR)
Pos. 5 Lower slab reinforcement (EOR)
Cross section of recommended cast-in-place reinforcement (supplied by building contractor)
Section A-A (Free edge)
Plan View
Shear force bars, Isokorb® Pressure bearings, Isokorb®
Pos. 1
Interior Slab
Pos. 6
Pos. 4
Balcony
Support
Pos. 1
Pos. 6
Pos. 4
Lower reinforcement (EOR)
type CV
A Support
Pos. 3 Pos. 5
Upper reinforcement (EOR)
A
Pos. 5
Section A-A Depiction of free balcony edge
106
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Schöck Isokorb® C-line type CV
Cast-in-place reinforcement, indirect support Suggestion for cast-in-place connective reinforcement For 100% section strength with a minimum concrete strength of 27.5 MPa [4,000 psi]. The existing slab reinforcement can be taken into account for the required reinforcement of connections with Schöck Isokorb®.
Schöck Isokorb® type
Units
CV10
CV20
CV30
Pos 1: Overlapping reinforcement upper layer Required cross-section area as
mm² / 1.0 m width
In accordance with EOR specifications
[in² / 1.0 ft width]
CV
Pos 2: Longitudinal edge Reinforcement Alternative 1
4 x #3
4 x #3
4 x #3
Alternative 2
4 x #5
4 x #5
4 x #5
#3 @ 250 mm
#3 @ 250 mm
#3 @ 250 mm
Pos 3: U-Bars for the slab edges Alternative 1 Alternative 2
[#3 @ 10"]
[#3 @ 10"]
[#3 @ 10"]
#5 @ 350 mm
#5 @ 350 mm
#5 @ 350 mm
[#5 @ 14"]
[#5 @ 14"]
[#5 @ 14"]
Pos 4: U-Bars for the free balcony edge mm² / 1.0 m width [in² / 1.0 ft width]
In accordance with EOR specifications
Products
Required cross-section area as Pos 5: Reinforcement bottom layer Required cross-section area as
mm² / 1.0 m width [in² / 1.0 ft width]
In accordance with EOR specifications
Pos 6: Longitudinal reinforcement Required cross-section area as
mm² / 1.0 m width [in² / 1.0 ft width]
In accordance with EOR specifications
Notes: — Pos. 4 should be chosen such that the link can be arranged between the legs of Pos. 3. — The upper and lower reinforcement of the connecting slabs must run as close as possible to the thermal insulation layer at both sides of the Schöck Isokorb®, taking the required concrete cover into consideration. — All free edges must be bordered using structural U-bars as per Engineer of Record (EOR) specifications.. — The centerline distance of any tension or shear bar from any free concrete edge, including expansion joints, must be at least 50 mm [2"]. — The centerline distance of any pressure element from any free concrete edge, including expansion joints, must be at least 50 mm [2"]. — The shear force reinforcement must be spliced to the tensile reinforcement in the slab to be connected. In cases in which shear force bars and pressure elements are not laid in one layer, the anchoring length for shear force bars must be determined in the compression zone in the same way as it is for for tension bars. — The lap splice length provided by Schöck Isokorb® = the length of the tension bar from the face of the Isokorb® to the free end - Concrete Cover (CC)
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107
Schöck Isokorb® C-line type CV Checklist
Products
CV
~
Has the Schöck Isokorb® type that is suitable for the structural system been chosen? Type CV is considered to be a shear force connection only (hinge joint).
~
Has the system span length (i.e., "ℓ"] been used for the design?
~
Have the factored member forces at the Schöck Isokorb® connection been determined at design level? Do the member forces at the Schöck Isokorb® connection include the effects of eccentricity of the connection?
~
Has the critical concrete strength been taken into consideration in the choice of design table?
~
Have both slabs adjacent to the Isokorb® been verified for bending and shear capacities by the Engineer of Record (EOR)?
~
Have the requirements with regard to fire re protection been determined, and has the relevant suffix (-R90 or R120) been added to the Isokorb® type designation in the design drawings?
~
Has the maximum permissible expansion gap spacing been taken into consideration for the specific slab configuration?
~
Have the horizontal loads such as those from earthquakes been taken into consideration? Additional EQ modules may be required.
~
Has the connecting reinforcement in the balcony and interior slabs been defined by the Engineer of Record (EOR)?
~
When using type CV and fully prefabricated parts, has the cast-in-place strip of concrete (width ≥ 50 mm [2"] from pressure bearing elements) that is required to create the tight fit of the HTE pressure bearing been included in the design drawings?
108
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Schöck Isokorb® C-line type CVB Design
CVB
Products
Schöck Isokorb® type CVB
The Schöck Isokorb® type CVB is suitable for supported reinforced concrete slabs with interior slab joists at interior slab level (CB for concrete beam). It transmits positive vertical shear force (V).
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109
110
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Schöck Isokorb® C-line type CVB Section/element arrangement
Balcony
Interior slab
Schöck Isokorb® type CVB with window wall systems and supported balcony
Type CVB
Interior slab
Schöck Isokorb® type CVB , supported balcony with steel studs, facing shell and insulation layer in between
CV
Position of Schöck Isokorb® type CVB The Schöck Isokorb® type CVB should be located in the insulating layer.
Orientation of Schöck Isokorb® type CVB
Products
Attention: the Schöck Isokorb® type CVB does not have a symmetrical design. — The lower spacing between the shear force bars and the insulating element at the bottom edge is always 40 mm [1 9/16"]. The upper spacing can vary. — Pay attention to installation orientation and show a cross section view on the design drawings. — The Schöck Isokorb® type CVB has the same design at the balcony side and the interior slab side.
Element arrangement
Interior slab
CEQ
Interior slab
Type CV Type CVB
Type CVB
Type CVB
Type CVB
Balcony
Balcony Support
Type CV
Support
Schöck Isokorb® type CVB, balcony supported with interior slab joist at interior slab level.
Support
Support
Schöck Isokorb® type CVB balcony supported at three sides with tie member.
Note — The Schöck Isokorb® CEQ module must be used for horizontal loads and earthquake loads. With horizontal tensile forces at right angles to the outside wall greater than the existing shear force, the Schöck Isokorb® CEQ module must also be used.
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111
Schöck Isokorb® C-line type CVB
Slab geometry/span length/expansion joints Recommended maximum span length The maximum span length results from the shear resistance, Vr.
Interior slab
Span length for the structural calculations
ℓ
The support of the balcony is assumed to be 100 mm [4"] from the Schöck Isokorb® insulating element at the interior slab side.
CVB
100 mm [3 15/16"]
CC
h
H
Balcony
Expansion joints (recommended balcony length) The expansion joint spacing shown in the illustration corresponds to a temperature difference of ∆T = 70 °C [126°F]. CVB10
CVB20
CVB30
180 mm [7"]
180 mm [7"]
180 mm [7"]
10.40 m [34'-2"]
9.10 m [29'-10"]
8.20 m [26'-9"]
Minimum slab thickness hmin
Products
Maximum expansion joint spacing e
≤ 1/2 e type CVB
Schöck dowel ESD
type CV type CVB
≤ 1/2 e
≤e
Schöck dowel ESD
Expansion joint type CV
Expansion joint type CV
type CVB
type CV
Support type CVB
type CV
≤ 1/2 e
Schöck Isokorb® type
type CVB
l
Schöck Isokorb® type CVB Expansion joint spacing
Note: — The maximum expansion joint spacing must be verified by the Engineer of Record (EOR). — The Schöck Isokorb® type CVB may be split at the non-reinforced locations. The spacing of the pressure elements from the free edge of the reinforced concrete slab must be at least 50 mm [2"], and the axis spacing of the shear force bars must be at least 100 mm [4"] and no more than 150 mm [6"]. — The expansion joint must be free to deform in the longitudinal direction, for which we recommend the A4 stainless steel Schöck Dorn ESD-K, for example.
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Schöck Isokorb® C-line type CVB Cross-section/type designation Concrete cover CC The concrete cover of the Schöck Isokorb® type CVB is set to 40 mm [1 9/16"] (CC40) from below. The concrete cover is always greater than 40 mm [1 9/16"] if the minimum slab thickness is complied with. Balcony
Interior slab
H
hmin
≥ 40 mm [1 9/16"]
CVB
40 mm [1 9/16"] 80 mm [3 1/8"]
ℓ
100 mm [3 15/16"]
Concrete cover with level balcony slab
Minimum slab thickness The following minimum slab thicknesses hmin must be complied with depending on the load capacity:
200 mm [7 7/8"]
210 mm [8 1/4"]
Type designation in design drawings The following type designation specifies the Schöck Isokorb® type that is required. The type designation is indicated on the design drawings. The type designation is printed on the sticker of the Schöck Isokorb® type as a recognition feature.
CVB30
H
CVB20
220 mm [8 5/8"]
Schöck Isokorb® type
CVB10
Ultimate (factored) shear resistance, Vr [kN/element]
Concrete covering CC40 [mm]
Isokorb® height H [mm]
hmin to 250
Minimum slab thickness hmin [mm]
ℓ
CC
Minimum slab thickness hmin
CVB10
hmin
Schöck Isokorb® type
CVB20 Concrete strength ≥ 30 MPa
32.0
44.5
200
210
— — — —
Type designation in design drawings
—
Balcony CC = ≥ 40 mm ≥ [1 9/16"]
with fire protection
CVB20-CC40-H210-R90
Type/load capacity Concrete cover Isokorb® height Fire protection
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80 mm [3 1/8"]
516 mm [1'-8 5/16"]
Interior slab
CC H CC 516 mm [1'-8 5/16"]
100
H = 210 mm [8 1/4"]
113
Products
Support
Schöck Isokorb® C-line type CVB Concrete cover Balcony 516 mm [1'-8 5/16"]
Interior slab 516 mm [1'-8 5/16"]
80 mm [3 1/8"]
≥ 47 mm [1 7/8"] H 40 mm [1 9/16"] H = 200 - 250 mm [7 7/8"] - [9 13/16"]
CV
Cross-section of Schöck Isokorb® type CVB10
Balcony
Interior slab
100 mm [3 15/16"]
150 mm [5 7/8"]
300 mm [11 13/16"] 100 mm [3 15/16"] 150 mm [5 7/8"]
Products
100 mm [3 15/16"]
516 mm [1'-8 5/16"]
80 mm [3 1/8"]
516 mm [1'-8 5/16"]
Overhead view of Schöck Isokorb® type CVB10 product
Balcony 719 mm [2'-4 5/16"]
80 mm [3 1/8"]
Interior slab 719 mm [2'-4 5/16"]
≥ 44 mm [1 3/4"] H 40 mm [1 9/16"] H = 210 - 250 mm [8 1/4"] - [9 13/16"] Cross-section of Schöck Isokorb® type CVB20
Balcony
Interior slab 50 mm [1 15/16"]
100 mm [3 15/16"] 300 mm [11 13/16"] 100 mm [3 15/16"]
200 mm [7 7/8"]
100 mm [3 15/16"]
50 mm [1 15/16"] 719 mm [2'-4 5/16"]
80 mm [3 1/8"]
719 mm [2'-4 5/16"]
Overhead view of Schöck Isokorb® type CVB20 product
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Schöck Isokorb® C-line type CVB Concrete cover Balcony 747 mm [2'-5 7/16"]
80 mm [3 1/8"]
Interior slab 747 mm [2'-5 7/16"]
≥ 41 mm [1 5/8"] H 40 mm [1 9/16"] H = 220 - 250 mm [8 11/16"] - [9 13/16"]
CV
Cross-section of Schöck Isokorb® type CVB30
Balcony
Interior slab 50 mm [1 15/16"]
100 mm [3 15/16"] 300 mm [11 13/16"] 100 mm [3 15/16"]
200 mm [7 7/8"]
100 mm [3 15/16"]
50 mm [1 15/16"] 747 mm [2'-5 7/16"]
80 mm [3 1/8"]
Products
747 mm [2'-5 7/16"] Overhead view of Schöck Isokorb® type CVB30 product
Schöck Isokorb® length and configuration Schöck Isokorb® type
CVB10
CVB20
CVB30
Isokorb® length [m]
0.3 [1'-0"]
0.3 [1'-0"]
0.3 [1'-0"]
200 - 250 [7 7/8" - 9 7/8"]
210 - 250 [8 1/4" - 9 7/8"]
220 -250 [8 5/8" - 9 7/8"]
2 ø 10 + 2 ø 10
2 ø 12 + 2 ø 12
2 ø 14 + 2 ø 14
1
2
2
Isokorb® height [mm] Shear force bars Steel pressure bearing pads (pc.)
Note: — The Schöck Isokorb® consists of metric components. — reinforcement bars ø 8 correspond to 5/16" — reinforcement bars ø 12 correspond to 1/2"
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115
Schöck Isokorb® C-line type CVB Design
The support is assumed to be 100 mm [3 15/16"] from the Schöck Isokorb® insulating element at the interior slab side.
CC
H
hmin
Support
100 mm [3 15/16"]
CVB20
CVB30
ℓ
CVB
Product selection table as per ACI 318-11 Schöck Isokorb® type Ultimate Factored Shear Strength ΦVn [per element]
Concrete covering CC40 40 mm [1 9/16"]
Isokorb® height H
hmin to 250 mm [9 7/8"]
Products
Minimum slab thickness hmin
CVB10
Concrete strength ≥ 27.5 MPa [4,000 psi] 41.4 kN
57.4 kN
81.0 kN
[9.3 kips]
[12.9 kips]
[18.2 kips]
200 mm
210 mm
220 mm
[7 7/8"]
[8 1/4"]
[8 5/8"]
Notes — With different balcony slab and floor slab concrete qualities, the weaker concrete should be used with the table above. — The shear capacity of the slabs must be verified by the Engineer of Record (EOR). — Because of the eccentric connection, a moment occurs at the slab edges at both sides of the Schöck Isokorb® type CVB. The transmission of this moment in the two connecting slabs must be verified in each individual case. — The Engineer of Record (EOR) must confirm the structural integrity of the slabs attached at both sides of the Schöck Isokorb®. When the reinforcement of the floor slab and the balcony slab which connect to the Schöck Isokorb® type CVB is being determined, it must be assumed that there is a hinge, since the Schöck Isokorb® type CVB can only transmit shear force. — The capacities are considering a maximum permitted bar separation according ACI 318-11. This has to be taken into account by the Engineer of Record (EOR).
116
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Schöck Isokorb® C-line type CVB Design
Deformation An estimate of the additional deformation from the Schöck Isokorb® type CVB was made on the basis of component testing. In the tests, the bearing points or bearing edges are subjected to vertical deformation of approx. 0.8 to 1.0 mm [1/16" to 5/128"].
Moments from eccentric connection In order to measure the cast-in-place connecting reinforcement at both sides of the Schöck Isokorb® type CVB, moments from an eccentric connection must also be taken into consideration. Each of these moments must be overlaid with the moments from the planned load, providing that they act in the same direction.
Vf
1/2 aV
Vf
1/2 aV
Vf
Vf Mecc, f
CVB
Interior slab
Balcony
Mecc, f
Vf Vf Mecc, f = Vf × 1/2 aV
Schöck Isokorb® type Δ Mecc,f
CVB10
CVB20
CVB30
7.1 kNm/m
10.7 kNm/m
16.5 kNm/m
[1.6 kip-ft/ft]
[2.4 kip-ft/ft]
[3.7 kip-ft/ft]
Products
Schöck Isokorb® length and configuration
Note: — These recommendations must be checked by the Engineer of Record (EOR) and modified if necessary.
1)
with max zv = 140 mm [5 1/2"]
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117
Schöck Isokorb® C-line type CVB Cast-in-place reinforcement
The cast-in-place reinforcement is defined by the Engineer of Record (EOR) in accordance with structural requirements. The shear force bars of the Schöck Isokorb® type CVB must be overlapped with the tensile reinforcement (Pos. 1). Positions 2 (longitudinal edge reinforcement) and Pos. 3 (U-Bars) must also be provided. The following is a suggestion for the reinforcement layout.
Cross-section f'c ≥ 27.5 MPa (4,000 psi) Balcony Pos. 1
CVB
A
Pos. 6
Pos. 2
Pos. 3
Pos. 3
Pos. 5
Pos. 6
Pos. 5
A Pos. 1
Upper balcony reinforcement (EOR)
Upper slab reinforcement (EOR)
Pos. 6
Pos. 6
Pos. 3
Products
f'c ≥ 27.5 MPa (4,000 psi) Interior Slab Pos. 1
Pos. 2
Pos. 2
Pos. 3
≥ 410 mm [1'-4 1/8"]
≥ 410 mm [1'-4 1/8"]
Pos. 6
Pos. 6
Lower balcony reinforcement (EOR)
Pos. 5 Lower slab reinforcement (EOR)
Cross section of recommended cast-in-place reinforcement (suppled by the building contractor)
Section A-A (Free edge)
Plan View
Pressure bearings, Isokorb® Shear force bars, Isokorb®
Pos. 1
Pos. 6
Interior Slab
A
A
type CV type CVB
type CVB Balcony
Pos. 4
Pos. 3 Pos. 5
Upper reinforcement (EOR)
Support Pos. 1
Pos. 6
Pos. 4
Lower reinforcement (EOR)
Support
Pos. 5
Section A-A Depiction of free balcony edge
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Schöck Isokorb® C-line type CVB
Cast-in-place reinforcement, indirect support Suggestion for cast-in-place connective reinforcement For 100% section strength with a minimum concrete strength of 27.5 MPa. [4,000 psi] The existing slab reinforcement can be taken into account for the required reinforcement of connections with Schöck Isokorb®.
Schöck Isokorb® type
Units
CVB10
CVB20
CVB30
Pos 1: Overlapping reinforcement upper layer Required cross-section area as
mm² / 1.0 m width
In accordance with EOR specifications
[in² / 1.0 ft width]
CVB
Pos 2: Longitudinal edge Reinforcement Alternative 1
4 x #3
4 x #3
4 x #3
Alternative 2
4 x #5
4 x #5
4 x #5
#3 @ 250 mm
#3 @ 250 mm
#3 @ 250 mm
[#3 @ 10"]
[#3 @ 10"]
[#3 @ 10"]
#5 @ 350 mm
#5 @ 350 mm
#5 @ 350 mm
[#5 @ 14"]
[#5 @ 14"]
[#5 @ 14"]
Pos 3: U-Bars for the slab edges Alternative 1 Alternative 2 Pos 4: U-Bars for the free balcony edge mm² / 1.0 m width [in² / 1.0 ft width]
In accordance with EOR specifications
Products
Required cross-section area as Pos 5: Reinforcement bottom layer Required cross-section area as
mm² / 1.0 m width [in² / 1.0 ft width]
In accordance with EOR specifications
Pos 6: Longitudinal reinforcement Required cross-section area as
mm² / 1.0 m width [in² / 1.0 ft width]
In accordance with EOR specifications
Notes: — Pos. 4 should be chosen such that the U-Bars can be arranged between the legs of Pos. 3. — The upper and lower reinforcement of the connecting slabs must run as close as possible to the thermal insulation layer at both sides of the Schöck Isokorb®, taking the required concrete cover into consideration. — All free edges must be bordered using structural U-bars. — The spacing of the tension/pressure bars from the free edge of the expansion gap must be at least 50 mm [2"]. — The centerline distance of any pressure element from any free concrete edge, including expansion joints, must be at least 50 mm [2"]. — The centerline distance of any tension or + shear bar from any free concrete edge, including expansion joints, must be at least 50 mm [2"]. — The shear force reinforcement must be spliced to the tensile reinforcement in the slab to be connected. In cases in which shear force bars and pressure elements are not laid in the same layer, the anchoring length of the shear force bars must also be determined in the compression zone, as it does for the tension bars. — The lap splice length provided by Schöck Isokorb® = the length of the tension bar from the face of the Isokorb® to the free end - Concrete Cover (CC)
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119
Schöck Isokorb® C-line type CVB Checkliste
Products
CVB
~
Has the Schöck Isokorb® type that is suitable for the structural system been chosen? Type CV is considered to be a shear force connection only (hinge joint).
~
Has the system span length (i.e., "ℓ"] been used for the design?
~
Has the respective shear resistance of the slab been checked with Vr of the Schöck Isokorb®?
~
Have the factored member forces at the Schöck Isokorb® connection been determined at design level?
~
Do the member forces at the Schöck Isokorb® connection include the effects of eccentricity of the connection?
~
Has the critical concrete strength been taken into consideration in the choice of design table?
~
Have both slabs adjacent to the Isokorb® been verified for bending and shear capacities by the Engineer of Record (EOR)?
~
Have the requirements with regard to fire protection been determined, and has the relevant suffix (-R90 or R120) been added to the Isokorb® type designation in the design drawings?
~
Has the maximum permissible expansion gap spacing been taken into consideration for the specific slab configuration?
~
Have the horizontal loads such as those from wind pressure or earthquakes been taken into consideration? Additional CEQ types may be required.
~
Has the connecting reinforcement in the balcony and interior slabs been defined by the Engineer of Record (EOR)?
120
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Schöck Isokorb® C-line type CEQ
CEQ
Products
Schöck Isokorb® type module CEQ 2
The Schöck Isokorb® type CEQ transmits loads from earthquakes from the balcony into the floor slab in interaction with the Schöck Isokorb® type CM, the Schöck Isokorb® type CMD or the Schöck Isokorb® type CV. The Schöck Isokorb® type CEQ1 absorbs shear force parallel to the insulating layer. The Schöck Isokorb® type CEQ2 absorbs shear force parallel to the insulating layer, pressure and tensile force normal to the insulating layer and positive moments.
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Schöck Isokorb® C-line type CEQ Section/element arrangement
Balcony
CEQ
Interior slab
Schöck Isokorb® module CEQ with type CM steel studs, facing shell and insulation layer in between
Balcony
Interior slab
Schöck Isokorb® module CEQ with type CV, supported balcony with steel studs, facing shell and insulation layer in between
Position of Schöck Isokorb® module CEQ The Schöck Isokorb® module CEQ should be located in the insulating layer.
Products
Orientation of Schöck Isokorb® module CEQ Attention: the Schöck Isokorb® type CEQ does not have a symmetrical design. The tension bar must be at the bottom. — The tension bar must be at the bottom. — The horizontal shear force bars are always 113 mm [4 7/16"] from the bottom edge of the Schöck Isokorb® type CEQ and the underside of the slab. — Pay attention to installation orientation and show a cross section view on the design drawings.
Element arrangement
Interior slab
CEQ
Type CM ≤ e/2
Interior slab
CEQ
Balcony
Schöck Isokorb® module CEQ with type CM indirect support
122
Type CV ≤ e/2
CEQ
Support
Balcony
CEQ
Support
Schöck Isokorb® module CEQ with type CV indirect support
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Schöck Isokorb® C-line type CEQ Concrete cover/expansion joints Concrete cover CC The concrete cover of the Schöck Isokorb® module CEQ2 is set to 40 mm [1 9/16"].
Interior slab
CEQ
h
H
Balcony
CC 40 mm [1 9/16"] 80 mm [3 1/8"]
ℓ
100 mm [3 15/16"]
Concrete cover of Schöck Isokorb® module CEQ
≤ e/2 (e.G. 5.65 m)
≤ e/2 (e.G. 5.65 m)
≤ e/2 (e.G. 5.65 m)
[18'-6 7/16"]
[18'-6 7/16"]
[18'-6 7/16"]
Schöck dowel type ESD
Schöck dowel type ESD
Expansion joint
Expansion joint type CM
type CV type CM
CEQ
l
The Schöck Isokorb® CEQ modules may be arranged with maximum spacing of 1/2 of the expansion joint distance of the Schöck Isokorb® type. These are shown in the respective product chapter. The illustration shows the example of combination with the Schöck Isokorb® type CM. The expansion joint spacing shown in the illustration corresponds to a temperature difference of ∆T = 70 °C [126 °F].
type CM
Schöck Isokorb® module CEQ expansion joints in combination with Schöck Isokorb® type CM
Note: — The maximum expansion joint spacing must be verified by the Engineer of Record (EOR).
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Products
Expansion joints (recommended balcony length)
slab V r, y M r, y
N r, x
y
Schöck Isokorb® C-line type CEQ
x
Type designation/product cross-section/overhead view of product Type designation in design drawings
Concrete strength ≥ 30 MPa Concrete cover CC = 40 mm
The following type designation identifies the Schöck Isokorb® type that is required. The type designation is indicated on the design drawings. The type designation is printed on the sticker of the Schöck Isokorb® module as a recognition feature.
CEQ
Ultimate (factored) moment resistance Mr [KNm/m]
Balcony
Type designation in design drawings
with fire protection
CEQ1
CEQ2
180
3.6
190
4.0
200
4.5
210
4.9
220
5.3
230
5.7
240
6.1
250
6.5
719 mm [2'-4 5/16"]
80 mm [3 1/8"]
719 mm [2'-4 5/16"]
Interior slab
— —
H CC CC = 40 mm [1 9/16"] 740 [2'-5 1/8"]
H = 200 mm [7 7/8"] 740 [2'-5 1/8"]
Products
Type/load capacity Isokorb® height Fire protection
CEQ2-H200-R90
Schöck Isokorb® type
Isokorb® height H [mm]
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Schöck Isokorb® C-line type CEQ
Type designation/product cross-section/overhead view of product Cross-section/Overhead view of product Balcony
Interior slab 223 mm [8 3/4"]
80 mm 223 mm [3 1/8"] [8 3/4"]
113 mm [4 7/16"]
H
H = 180 - 250 mm [7 1/16"] - [9 13/16"]
CEQ
Product cross-section of Schöck Isokorb® module CEQ1
Balcony
Interior slab
131 mm [5 3/16"]
100 mm [3 15/16"]
80 mm [3 1/8"]
223 mm [8 3/4"]
Products
223 mm [8 3/4"]
Overhead view of Schöck Isokorb® module CEQ1
Balcony
Interior slab 719 mm [2'-4 5/16"]
80 mm [3 1/8"]
719 mm [2'-4 5/16"]
113 mm [4 7/16"] 740
740
[2'-5 1/8"]
[2'-5 1/8"]
H
H = 180 - 250 mm [7 1/16"] - [9 13/16"]
Product cross-section of Schöck Isokorb® module CEQ2
Balcony
Interior slab
13.5 mm [9/16"] 127 mm [5"]
36.5 mm [1 7/16"]
100 mm [3 15/16"]
13.5 mm [9/16"]
42 mm [1 5/8"] 36.5 mm [1 7/16"] 719 mm
719 mm
[2'-4 5/16"]
[2'-4 5/16"]
740 mm [2'-5 1/8"]
80 mm [3 1/8"]
740 mm [2'-5 1/8"]
Overhead view of Schöck Isokorb® module CEQ2 Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
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Schöck Isokorb® C-line type CEQ Configuration/design
Schöck Isokorb® length and configuration Schöck Isokorb® type
CEQ1
CEQ2
Isokorb® length [m]
0.1 [3 15/16"]
0.1 [3 15/16"]
180 - 250 [7"-9 7/8"]
180 - 250 [7"-9 7/8"]
1ø8+1ø8
1 ø 12 + 1 ø 12
–
2 ø 12
Isokorb® height [mm] Shear force bars Tension bars, bottom
Design CEQ
Balc ony
ΦΦΦMn: Design value of positive moment ΦVn: Normal design force normal to insulating level. ΦVn: Design shear force parallel to insulating level.
Interior slab ΦVn ΦNn
ΦMn y
x
Products
Schöck Isokorb® type CEQ sign convention
Note: — The Schöck Isokorb® consists of metric components. — reinforcement bars ø 8 correspond to 5/16" — reinforcement bars ø 12 correspond to 1/2"
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Schöck Isokorb® C-line type CEQ Design
Product selection table as per ACI 318-11
Concrete cover CC = 40 mm (1 9/16"]
Ultimate (factored) Moment Resistance ΦMn
Ultimate (factored) Normal Force Resistance ΦNn
Ultimate (factored) Shear Resistance ΦVn
CEQ1
Isokorb® height H
Suitable Slab Thickness
Units
180 mm
180 mm
kNm
(7"]
(7"]
(kip-ft)
190 mm
190 mm
kNm
(7 1/2"]
(7 1/2"]
(kip-ft)
200 mm
200 mm
kNm
(7 7/8"]
(8"]
(kip-ft)
210 mm
210 mm
kNm
CEQ2
Concrete strength ≥ 27.5 MPa (4,000 psi) – – – –
4.9 (3.6) 5.4 (4.0) (4.4) 6.5 (4.8)
(8 1/4"]
(8 1/2"]
(kip-ft)
220mm
220 mm
kNm
(8 5/8"]
(8 3/4"]
(kip-ft)
230 mm
230 mm
kNm
(9"]
(9"]
(kip-ft)
240 mm
240 mm
kNm
(9 1/2"]
(9 1/2"]
(kip-ft)
250 mm
250 mm
kNm
(9 7/8"]
(10"]
(kip-ft)
180 - 250 mm
180 - 250 mm
kN
29.4
(7" - 9 7/8"]
(7" - 10"]
(kips)
(6.6)
180 - 200 mm
180 - 200 mm
kN
±13.3
±29.8
(7"-7 7/8"]
(7" - 8"]
(kips)
(±3.0)
(±6.7)
210 mm
210 mm
kN
±13.3
±29.8
(8 1/4"]
(8 1/2"]
(kips)
(±3.0)
(±6.7)
220 mm
220 mm
kN
±13.3
±29.8
(8 5/8"]
(8 3/4"]
(kips)
(±3.0)
(±6.7)
230 mm
230 mm
kN
±13.3
±29.8
(9"]
(9"]
(kips)
(±3.0)
(±6.7)
240 mm
240 mm
kN
±13.3
±29.8
– – – –
CEQ
6.0
7.1 (5.2) 7.6 (5.6) 8.1 (6.0) 8.7
Products
Schöck Isokorb® type
(6.4)
(9 1/2"]
(9 1/2"]
(kips)
(±3.0)
(±6.7)
250 mm
250 mm
kN
±13.3
±29.8
(9 7/8"]
(10"]
(kips)
(±3.0)
(±6.7)
Notes — The design values relate to the individual element. — ΦMn and ΦNn do not occur simultaneously. The Engineer of Record (EOR) must consider the interaction between bending moment and normal (axial) force.
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Schöck Isokorb® C-line type CEQ Checklist ~
Have the factored member forces at the Schöck Isokorb® connection been determined at design level?
~
Has the critical concrete strength been taken into consideration in the choice of design table?
~
Have the requirements with regard to fire protection been determined, and has the relevant suffix (-R90 or R120) been added to the Isokorb® type designation in the design drawings?
~
Have the maximum permissible expansion joint distances "e/2" from the fixed point been taken into consideration?
~
Has the moment resistance of the CM/CEQ assembly been reduced (by 1/1.1) to account for the installation of the CEQ module?
Products
CEQ
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Schöck Isokorb® Products
Products for further applications Structural thermal breaks for further applications Some connections cannot be put into practice with the standard products shown in this manual. For such cases, special versions are available from the Design Department by request (for contact see pg. 2). This also applies to additional
requirements as a result of prefabricated or precast construction methods (e.g. restrictions because of manufacturing conditions or transportation width), which may be fulfilled using threaded socket bars.
Bending of reinforcing steel The bending of bars that might be required for special structures is carried out in our factory and the final assembly of the Schöck Isokorb® is completed. This process is monitored to ensure that the conditions of ACI 318-11 with regard to the bending of reinforcing steel are complied with. Attention: if Isokorb® reinforcing steel is subsequently bent on site or bent
and re-straightened in contravention of the applicable regulations, adherence to and monitoring of the relevant conditions is outside the responsibility of Schöck USA, Inc. and Schöck Bauteile GmbH, the manufactorer of Schöck Isokorb. In such cases, our warranty is rendered null and void.
CEQ
Products
Stepped balconies:
Application: Connections at stepped concrete cantilever balconies with moment and positive shear loads, when the level of the balcony is set lower or higher than the floor slab. The element transfers bending moments and vertical shear forces.
Slab Edges and Corbels
Application: Connections for concrete slab edges and concrete corbels as support for masonry etc. The element transfers vertical shear forces and small bending moments. Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
129
Schöck Isokorb® Products
Products for further applications Parapets
CEQ Application: Connections for concrete parapets. The element transfers vertical shear forces and small bending moments.
Products
Steel beams
Application: Connections for cantilever and supported steel beams to concrete slabs. The element transfers bending moments and shear forces.
Passiv houses
Application: Connections for higher requirements concerning energy consumption, for example low energy buildings or passive houses. The element transfers bending moments and vertical shear forces. 130
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Schöck Isokorb® Structural Thermal Break Schöck Isokorb® Products Schöck Isokorb® Structural Design
Structural Design
Schöck Isokorb® Installation
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132
Schöck Isokorb® Structural Design Design notes
Schöck professional service The technical details of a Schöck Isokorb® solution for a construction project are worked out by specialists at Schöck USA. The basis of the design are the project documents that are provided and the product information in this technical manual. Isokorb products are selected for each design situation specifically to satisfy the requirements of the Structural Engineer of Record (SER or EOR) for the project. Please contact the Schöck design department for your specific project solution.
The professional service includes — sizing flexural and shear reinforcement through the thermal break gap for the applied loads. The loads shall include: area, line and concentrated loads (dead & live) on the cantilever slab as well as any loads from façade elements bearing directly on the balcony slab, earthquake loads, wind loads, etc. which are provided by the Engineer of Record (EOR). — recommendation for designing length of lap splices between Isokorb’s reinforcement and that of the balcony slab and interior slab — recommendation for verification/sizing of hoop ties for bursting stresses — recommendation for verification of deflections at tip of the exterior slab due to Schöck Isokorb® — recommendation of any additional reinforcement required for crack control due to the stresses generated by the Isokorb® (bearing zone and edge conditions) — recommendation for expansion joints due to Isokorb alignment
Engineer of Record (EOR) responsibility
Structural Design
The responsibility for checking Schöcks recommendations about on-site measures such as cast-in-place reinforcement, expansion joint length and the determination of overall deformation lies with the Engineer of Record (EOR), and must be documented in the design drawings. For further details see the section entitled Products (section 3).
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Schöck Isokorb® Structural Design Example S-Linie
Example of moment connections 2 Schöck Isokorb® type S22 1
Side elevation
Steel member with end plate accrding to structural requirements
30 ≥ b ≤ 50 [1 15/16"]
Vr ; Vf,h
a
Vr,v
Pr
Pr
Pr
Pr
Pr
30 ≥ b ≤ 50 [1 15/16"]
Plan elevation
Vr,v ; Vr,h
Pr
Plan elevation 260 mm [10 1/4"] 80 mm [3 1/8"]
90 mm [3 9/16"]
≥ 200 [7 7/8"]
90 mm [3 9/16"]
Hd
Structural Design
30 - 40 [1 3/16"] - [1 9/16"]
d
d
30 - 40 [1 3/16"] - [1 9/16"]
Load-bearing capacity of the individual module: (LRFD)
S22 Vc Vc Pc
6 kN [1.35kips]1) 36 kN [8.1 kips] 225.4 kN [50.6 kips] 1)
Always refer to the information about expansion joints/fatigue resistance on pages 25 - 26 und 65 - 66
Schöck Isokorb® for connection of members with S22
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Schöck Isokorb® Structural Design Example S-Linie
Example of moment connections 2 Schöck Isokorb® type S22 Loads:
Load case 1: Load case 2: a = 9"
Vr,v = 5.6 kips Vr,v =-5.6 kips
Vr,h = ±0.45 kips Vr,h = ±0.45 kips
Mr= -11.1 kip-ft Mr= 11.1 kip-ft
Verifications for S22 module Shear force and horizontal force Vr,v Vc,v
< 1.0
Vr,h Vc,h
< 1.0
Moment for load case 1 Mr Mc
< 1.0
Pr Pc
< 1.0
Vr,v /Vc,v Vr,h/Vc,h
= 5.6 kips/8.1 kips = 0.69 < 1.0 = 0.45 kips/1.35 kips = 0.33 < 1.0
Pr = Mf/a = - 11.1 kip-ft *12/9" = 14.8 kips Pr/Pc = ±14.8 kips/50.6 kips = 0.29 < 1.0
Shear force and moment for load case 2 (uplift) Vr,v Vc,v
< 1.0
Vr,v/Vc,v = 5.62 kips/8.1 kips = 0.69 < 1.0
Pr Pc
< 1.0
Pr = Mr = 11.1 kip-ft *12/9" = 14.8 kips Pr/Pc = ±14.8 kips/50.6 kips = 0.29 < 1.0
Interaction
Structural Design
3 × Vr,v + 2 × Vr,h + Pr ≤ Pc 3 × 5.6 + 2 × 0.45 + 14.8 = 32.5 ≤ 50.6
Notes — As it cannot be ensured that the S22 modules establish a similarly large resistance to the resistance of shear forces at the same time, only the module which is located in the compressive area must be used to dissipate shear forces.
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Schöck Isokorb® Structural Design Example S-Linie
Example of moment connections 2 x 4 Schöck Isokorb® type S22 2
Steel member with end plate accrding to structural requirements
Side elevation
Pr
Pr
Vr,v ; Vr,h 4 4
n × Pr
n × Pr
Vr,v ; Vr,h 4 4
30 ≥ b ≤ 50 [1 15/16"]
a
Vd
e1
e2
30 ≥ b ≤ 50 [1 15/16"]
Load per 2 type S22
30 ≥ b ≤ 50 [1 15/16"] 30 ≥ b ≤ 50 [1 15/16"]
n = e1 / e2 260 mm [10 1/4"]
Plan elevation 90 mm [3 9/16"]
80 mm [3 1/8"]
n × Pr
Vr,v ; Vr,h 4 4
n × Pr
Pr
Vr,v ; Vr,h 4 4
Tr
Plan elevation 90 mm [3 9/16"]
Structural Design
≥ 400 [1'-3 3/4"]
Hd
30 - 40 [1 3/16"] - [1 9/16"]
d
d
30 - 40 [1 3/16"] - [1 9/16"]
e3
Load-bearing capacity of the individual module:
S22 6 kN
Vr,h
[1.35kips]1)
Vr,v
[8.1 kips]
Tr, Cr
36 kN 225.4 kN [50.6 kips]
1)
Always refer to the information about expansion joints/fatigue resistance on pages 25 - 26 und 65 - 66
Schöck Isokorb® for connection of members with 8 S22 modules
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Schöck Isokorb® Structural Design Example S-Linie
Example of moment connections 2 x 4 Schöck Isokorb® type S22 Example: Moment connection for HEA 360 with 2 x 4 S22 modules Loads: Load case 1 (status during usage): Load case 2 (assembly):
Vr,v = 28.3 kips Vr,v = 21.5 kips
Vr,h = ± 4.5 kips
Mr,y = -174.0 kip-ft Mr,y = 70 kip-ft
Mr,z = ± 16.2 kip-ft Pr = 36.0 kips
e1 = 8.46"w e2 = 17.7" e3 = 11" (axis separation of the outer row of bolts)
Verification of the load case "in operation": Shear force and horizontal force at load case 1 Vr,v Vc,v
Vr,h Vc,h
< 1.0
< 1.0
Vc,v = 4 × 8.1 kips = 32.4 kips Vr,v/Vc,v = 28.3/32.4 = 0.87 < 1.0 Vc,h Vr,h/Vc,h
Moment at load case 1 Mr,y = 2 × Pr × e2 + 2 × Mr,y
Pr =
Pr Pc
e1 e2
Load per type S22 × P r × e1
e 2 × e2 + 2 × 1 e 1 e2
174 kip-ft x 12 8.46 2 × 17.7 + 2 × 8.46 17.7 Pr/Pc
< 1.0
= 4 × 1.35 kips = 5.4 kips = 4.5/5.4 = 0.83 < 1.0
= 47.8 kips
= ±47.8 kips/±50.6 kips = 0.94 < 1.0
Deformation due to Mc (see page 64) resulting from unfactored loads Φ=
M c
[rad]
c = 13704 × a
2
Φ=
174/1.45 x 12 2,343,384
(
Structural Design
Buckling angle
[rad]
)
2
(8.46 in + 17.72 in) c = 13704 × = 2,343,384 [kip-in/rad] 2
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137
Schöck Isokorb® Structural Design Example S-line
Example of moment connections 2 x 4 Schöck Isokorb® type S22 Loading combination during assembly: Shear force at load case 2 Vr,v Vc,v
Vc,v = 4 × 8.1 kips = 32.4 kips Vr,v/Vc,v = 21.6 kips/32.4 kips = 0.67 < 1.0
< 1.0
Moment at load case 2 (uplift) Mr,y = 2 × Pr × e2 + 2 ×
e1 × P c × e1 e2
Mr,z 1) = 2 × Pr × e3 Verification of the bolts under the highest loads for compressive loads from bi-axial bending1) Pr Pc Pr =
Pr =
< 1.0 Mr,y
M P + 1) r,z + 2)r e1 2 × e3 8 4 × e2 + 4 × × e1 e2 70 kip-ft x 12 8.46 2 × 17.7 + 2 × × 8.46 17.7
+
16.22 kip-ft x12 36.0 kips + 8 2 × 11
Pr = 9.6 + 8.84 + 4.5 = 22.9 kips
Structural Design
Pr/Pc = 2 x 22.9 = 45.9 kips /50.1 kips = 0.94 < 1.0
1) 2)
Conserevatively, only the external bolts are considered as being load-bearing. The calculations are performed with just 2 bolts, as Cf relates to 1 module. Number of modules subjected to a compressive load due to normal force Cf.
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Schöck Isokorb® End plate designing S-line Example - end plate protruding
The dimensional tolerances for the head plate are Calculation of max. bolt force: Max. moment in the end plate: Mr = Pr, max × al = [kip-in] S = d2 × bef/6 = [in3]
Pr, max = Pr, max per bolt 2
bf = min (b1; b2/2; b3/2) d = thickness of end plate c = diameter of U-washer c (S22) = 1 9/16" b1 = 2 × al + c [in] b2 = member width or width of end plate [in] b3 = 2 × al + c + 3 15/16 in
Mc = øFyS [kip-in] Mr/Mc = ≤ 1.0
b3 b1 al
c
al
c
al
al
45°
b2
100
Schöck Isokorb® type S22 22 dimensioning of the end plate
Example - end plate flush
S = d2 × bef/6
bf = b – 2 × f d = thickness of end plate f = diameter of bolt hole f (S22) = 15/16" b = width of end plate
Mc = øFyS [kip-in] Mr/Mc = ≤ 1.0
d
h-t
al + tf /2
a
f
tf
Structural Design
Pr t Mr = Pr × (al + ) 2
al + tf/2
Max. tensile or compressive force per module: Max. moment in the end plate:
Schöck Isokorb® type S22 dimensioning of the end plate Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
139
Schöck Isokorb® Structural Design Example C-line Architect/support structure planner
This design example should help to understand the calculations made by Schöck and check them with regard to the building design. The planning of balconies with the Schöck Isokorb® takes place using the following procedure: — Cantilever length => thickness of balcony slab — Length of balcony -> Expansion joints required in balcony? — Assume load — Calculate bending moment — Calculate shear force — Select Schöck Isokorb® type — Calculate deformation -> Specify camber — Determine cast-in-place reinforcement — Show Schöck Isokorb® in the drawings (item numbers) — Show cross-section of Schöck Isokorb®
Required input from Architect/Structural Engineer
3
Schöck requires the following design information from the architect and structural engineer:
C
[4'-8 1/2"]
1435
A
A 2070 [6'-9 1/2"]
230 mm
Figure 1: Building plan view
1355 mm [4'-5 3/8"]
[9 1/16"]
Structural Design
- Balcony cantilever length - Overall length of balcony - Height of balcony slab - Required concrete covering CC = 40 mm [1 9/16"] - Drainage direction + slope of top of balcony slab - Concrete quality at interior slab side (e.g.: 27.5 MPa [4,000 psi]) - Concrete quality at balcony side (e.g.: 27.5 MPa [4,000 psi])
4
80 mm [3 1/8"]
1435 mm [4'-8 1/2"]
Figure 2: Building cross-section
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Schöck Isokorb® Structural Design Example C-line Slab geometry
Selecting the Schöck Isokorb® height H
1424 mm [4'-8 1/16"]
Schöck Isokorb® height H = 230 mm [9"] = slab thickness h Concrete cover of Schöck Isokorb® CC55 [2 3/16"] Required concrete cover CC = 40 mm [1 9/16]
Checking the balcony geometry Minimum thickness of sloping balcony slab Maximum slope of top of balcony slab 9/16" / 2'-4 1/2" =2%
l = 1524 mm [5']
100 mm [3 15/16"]
lB = 2070 mm [6'-9 1/2"]
min hB = 9" – 0.02 × 4'-5 11/16" = 8" selected: hB1 = 215 mm [8 7/16"]
Figure 3: Overhead view of balcony
Maximum cantilever length max ℓ = 8'-0" => max ℓ = 8'-0" ≥ ℓ = 5'-7/16" (Table pg. 71 Technical Manual ) Recommended maximum balcony length max lB = 37'-7/8" (expansion joint spacing) (Drawing pg. 71 Technical Manual)
190 mm [7 1/2"]
200 mm [7 7/8"]
2.1 m [6'-10"] 1.88 m [6'-2"]
max ℓ with Isokorb® height H 210 mm [8 1/4"]
220 mm [8 5/8"]
230 mm [9"]
240 mm [9 1/2"]
2.25 m [7'-4"]
2.39 m [7'-10"]
2.54 m [8'-4"]
2.68 m [8'-10"]
2.83 m [9'-3"]
2.03 m [6'-6"]
2.17 m [7'-2"]
2.32 m [7'-7"]
2.46 m [8'-0"]
2.61 m [8'-6"]
Figure 5: Flexural slenderness table, page 71
=> max lB = 1130 mm ≥ lB = 6'-9 1/2"
Possible connection length Interior slab H
CC
≤ 5.65 m
≤ 11.30 m
[18'-6 7/16"]
[37'-0 7/8"]
type CV
80 mm
Schöck dowel [3 1/8"] type ESD Expansion joint
type CM
Schöck dowel type ESD
100 mm [3 15/16"]
Expansion joint type CM
l
1524 mm [5']
230 mm [9 1/16"]
215 mm [8 7/16"]
CM10-CC55-H230
1344 mm [4'-4 15/16"]
Structural Design
100 mm [3 15/16"]
ℓ
55 mm [2 3/16"]
h
Balcolength. ny Attention must be paid to the possible connection With a balcony length of 6'-9 1/2" it is 6'-6" (2 x Schöck Isokorb), 2 3/4" insulation must be arranged on site
type CM
Figure 4: Cross-section through balcony
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Schöck Isokorb® Structural Design Example C-line Verification at Ultimate Limit States In this design example it has been assumed that the balcony is not put under stress by earthquakes or other horizontal loads.
1.4 DL = 1.4 × 100 [ lbs/ft ] 1.6 LL = 1.6 × 100 [ lbs/ft² ]
Choice of static system Load: Railing load (DL= 100 lbs/ft) Variable load (LL = 100 psf) Weight of balcony slab (DL = 150 psf × 9/12 = 113 psf) Dead Load Factor (DL) 1.4 Live Load Factor (LL) 1.6
1.4 DL = 1.4 × 113 [ lbs/ft² ]
l = [5'-0"]
Figure 5: Static system
Calculation of factored moment Mu Mu = (-1.4 × (100 × 5 ft + 113 × 5²/2) - 1.6 × 100 × 5² /2) × 81.5/78 Mu = -4,888 lb-ft/ft = -4.89 kip-ft/ft Calculation of factored shear force Vu Vu = (1.4 × (100 + 113x5) + 1.6 × 100 × 5) × 81.5/78 Vu = 1,809 lbs/ft =1.81 kips/ft Select Schöck Isokorb® load capacity (technical manual table pg. 77)
Structural Design
Concrete quality ≥ 27.5 MPa [4,000 psi] H = 9" CC = 2 3/16" selected: CM10-CC55-H230 Maximum moment capacity øMn = -6.9 [kip-ft/ft] ≥ Mu = -4.89 kip-ft/ft Maximum shear force capacity øVn = 3.6 [kips/ft] ≥ Vu = 1.81 [kips/ft]
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Schöck Isokorb® Structural Design Example C-line Verification at Serviceability Limit States
The Schöck engineer will only specify the additional deformation w2 from the Schöck Isokorb. The Engineer of Record (EOR) can calculate a camber taking the deformation of the slab w1 and the angle of rotation of the interior slab into consideration. 1,0 DL 1,0 LL 1,0 DL
Support
Load: Railing load (DL= 100 lbs/ft) Variable load (LL = 100 psf) Weight of balcony slab (DL = 150 pcf x 9/12 = 113 psf) Partial safety coefficient for permanent loads (DL) 1.0 Partial safety coefficient for variable loads (LL) 1.0 Calculation of unfactored moment M M = - ((100 x 5 ft + 113 x 52/2) + 100 x 52/2) × 81.5/78 M = - 3.30 kip-ft/ft
1.0 DL = 1.0 × 100 [ lbs/ft ]
1.0 DL = 1.0 × 113 [ lbs/ft² ]
l = [5'-0"]
Figure 6: Static system deformation
Deformation factors tan α
Schöck Isokorb® type
Concrete cover CC = 55 mm
w2 [in] = tan α × ℓ ×
1 100
Isokorb height H [mm]
CM10
CM20
200
1.0
1.0
CM30 1.1
210
1.0
1.0
1.0
220
0.9
0.9
0.9
230
0.8
0.8
0.8
240
0.8
0.8
0.8
250
0.7
0.7
0.7
Figure: Deformation factor table (Page 81)
Structural Design
w2 = 0.8 × 60 × (3.3/(6.9/1.5))*/100 w2 = 0.34 in The deformation details have a tolerance of ± 3/16"
100
ℓ
1.0 LL = 1.0 × 100 [ lbs/ft² ]
Deformation due to Schöck Isokorb® w2
M × øMn 1.5
H
h
CC
Choice of static system deformation
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Schöck Isokorb® Structural Design C-line Cast-in-place reinforcement Required cast-in-place reinforcement Cross-section f'c ≥ 27.5 MPa (4,000 psi) Balcony Pos. 1 A
The cast-in-place overlapping reinforcement is at least required to overlap the tension bars of the Schöck Isokorb®. The Engineer of Record (EOR) must check whether the overlapping joint is also sufficient with regard to the required upper reinforcement position. (see pg. 78) The cast-in-place reinforcement is supplied by the building contractor.
f'c ≥ 27.5 MPa (4,000 psi) Pos. 1 Interior Slab
Pos. 2
Pos. 6 A Upper balcony reinforcement (EOR)
Selected Schöck Isokorb®: CM10-CC55-H230
Pos. 6
Pos 1 #4@6" Pos 2 4-#3 Pos 3 #3@12" Pos. 4 must be selected in accordance with the Engineer of Record (EOR) specification, and is not shown by Schöck.
Pos. 6 Pos. 3
Upper slab reinforcement (EOR)
Pos. 1 Pos. 2
Pos. 6
Pos. 3
Pos. 3
≥ 410 mm [1'-4 1/8"] Pos. 6
≥ 410 mm [1'-4 1/8"] Pos. 6
Pos. 5
Lower balcony reinforcement (EOR)
Lower slab reinforcement (EOR)
Cast-in-place reinforcement Schöck Isokorb® type
CM10
CM20
Pos 1: Overlapping reinforcement 680
910
Alternative 1
10M @ 140mm
10M @ 100mm
Alternative 2
15M @ 250mm
15M @ 200mm
Minimum [mm]
562
562
provided by Schöck Isokorb® [mm]
700
700
Required cross-section area as [mm² / 1.0 m width]
Required lap splice length Pos.1
Pos 2: Longitudinal edge reinforcement Alternative 1
4 x 10M
4 x 10M
Alternative 2
4 x 15M
4 x 15M
Alternative 1
10M @ 300mm
10M @ 300mm
Alternative 2
15M @ 350mm
15M @ 350mm
Pos 3: U-Bars for the slab edges
Pos 4: U-Bars for the free balcony edge Required cross-section area as [mm² / 1.0 m width]
In accordance with EOR specifications
Structural Design
Pos 5: Reinforcement bottom layer
Schöck Isokorb® Cast-in-place reinforcement
— — — — — —
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Schöck Isokorb® Structural Design C-line Representation in the installation plans 1000 mm [3'-3 3/8"]
70 mm [2 3/4"]
CM10-CC55-230
1000 mm [3'-3 3/8"]
CM10-CC55-230 On-site insulation
1344 mm [4'-4 15/16"]
1344 mm [4'-4 15/16"]
Pos. ① #3@6"
Pos. ③ U-bar #3@12"
Outside
80 mm [3 1/8"]
Pos. ② 2 × #3 Pos. ③ U-bar #3@12"
Inside
Pos. ① #3@6"
2070 mm [6'-9 1/2"] Figure 9: Overhead view of Schöck Isokorb®
2'-3" lap MIN
2'-3" lap MIN CM10-CC55-H230
Pos. ② 4 × #3
U-bar by EOR
bottom reinforcement by EOR 1344 mm [4'-4 15/16"] 1524 mm [5']
Pos. ③ U-bar #3@12" 80 mm [3 1/8"]
bottom reinforcement by EOR
Figure 10: Cross-section of Schöck Isokorb®
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Structural Design
215 mm [8 7/16"]
230 mm [9 1/16"]
Pos. ① #30@6"
146
Schöck Isokorb® Structural Thermal Break Schöck Isokorb® Products Schöck Isokorb® Structural Design
Installation
Schöck Isokorb® Installation
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Schöck Isokorb® Type S22 Installation Manual
1
S22
2
2 — Coloured areas shows the general positions for installing the products. Hew to the design drawing of the structural engineer for its definite position. 2 +3 The pictures exemplify the general positions for installing the products within the insulation layer. Hew to the design drawing of the structural engineer for its definite position. Schöck Isokorb® Type S22 must be installed in accordance with the design drawings of the engineer only.
3A
3B
1 — Before installation, check products for conformity with purchase order and that no Isokorb parts are missing. — Check products for visible damages. — Check product for correct type conforming to the design drawings of the structural engineer. — Ensure that the materials required to install Schöck Isokorb® for the construction project are complete.
3C
4 Based upon the design drawings of the engineer, ensure that all Schöck Isokorb® Type S22 and thermal insulation pieces are complete.
Installation
4
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Schöck Isokorb® Type S22 Installation Manual
5 Install Schöck Isokorb® Type S22 according to the design drawings on the head plate of the steel beam within the building shell. Fasten Schöck Isokorb® Type S22 with the washers and nuts delivered along with the product in the order as shown in the image 5A.
5
1.
2.
S22
5A
M 22: Mr = 80 Nm or 59 lb-ft
6 Use a torque wrench to tighten all nuts on the head plate according to the tightening torque predefined for the bolt as pictured.
6
7 Fit any additional thermal insulation pieces at the head plate of the steel beam between the insulation bodies of Schöck Isokorb® Type S22.
7
8 Remove and retain all pre-installed exterior nuts and washers before connecting the exterior steel beam.
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Installation
8
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Schöck Isokorb® Type S22 Installation Manual
9 Guide the exterior steel beam with the head plate towards the connection prepared with Schöck Isokorb® Type S22 and thermal insulation pieces. Position the exterior steel beam in a manner that prevents restraint when the Schöck Isokorb® bolts are fitted.
9
0 Fasten steel beams on the Schöck Isokorb® Type S22 with the delivered washers and nuts in the order as shown in the image.
1. 2. S22
10
M 22: Mr = 80 Nm or 59 lb-ft
ß Use a torque wrench to tighten all nuts on the head plate without systematic prestressing according to the tightening torque predefined for the bolt as pictured.
11
“ +„ Check the alignment and tight fit of the steel beams for one final time and then deeply notch all bolts directly at the nut in order to ensure that all nuts remain in a frictional connection.
Installation
12
Use the included washers and nuts for Schöck Isokorb® Type S22 only.
13
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Schöck Isokorb® Type CM Installation Manual
1+2 — Before installation, check products for conformity with purchase order and that no Isokorb parts are missing. — Check products for visible damages. — Check product for correct type conforming to the design drawings of the structural engineer. — Ensure that the materials required to install Schöck Isokorb® for the construction project are complete. 1
2 — The picture exemplifies the general position for installing the products within the insulation layer. Hew to the design drawing of the structural engineer for its definite position.
CM 2
3 The pictures exemplify the general position for installing the products within the insulation layer. Hew to the design drawing of the structural engineer for its definite position. Schöck Isokorb® Type CM must be installed in accordance with the design drawing of the engineer only. 3A
3B
≥ 2”
3C
Image 3D: Installing of Schöck Isokorb® in touch with semi-finished ceiling component. — Observe the pictured dimension for the pressure joint on the ceiling. — Place a cast-in-place concrete strip between Schöck Isokorb® Type CM and the semi-finished ceiling component. — The pressure joint must be filled and compacted properly when the concrete is placed.
3D
4 Check the slope of the balcony formwork according to the technical specifications provided by the structural engineer.
Installation
4
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Schöck Isokorb® Type CM Installation Manual
4A
5 Install the lower slab reinforcement and edge brackets according to the reinforcement layout provided by the structural engineer.
5
CM
6
6+7 Install the connectors and longitudinal bars in the bracket corners along the Schöck Isokorb® Type CM. Select the bar size and the positioning of connectors and longitudinal bars as defined by the structural engineer, . If the bar size is not defined higher, select at least a minimum size of #3. Install the connectors close to the tension bars of Schöck Isokorb® Type CM.
≤ 2” ≤ 2”
6A
Installation
7
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Schöck Isokorb® Type CM Installation Manual
8 Install Schöck Isokorb® Type CM as a full element (3’-3 3/8”) or a half element (19 5/8”) only!, and in accordance with the design drawing of the structural engineer.
l
Do not use an angle grinder for cutting a full element into half elements.
8
l = x · 19 5/8” l
l = x · 19 5/8” + 2 y y
l y
19 5/8” = ½ Isokorb®
Image 8A: In the event that half of the length of a Schöck Isokorb® Type CM is being fitted into a balcony, the remaining half can be used for other balconies of the same type and with the same load requirements. Image 8B: In the event that the Schöck Isokorb® Typ CM does not fit into the balcony, thermal insulation strips are required on site in addition to the Schöck Isokorb® Type CM. These thermal insulation strips must not exceed a length of 9 7/8”. They may be installed at the edges of the balcony or between two Schöck Isokorb® Type CM, according to the design drawing of the structural engineer.
CM
It is recommended to use thermal insulation strips with a thermal conductivity value 0.031 W/(m*K) or lower, and with the same thickness as Schöck Isokorb® Type CM. Cut thermal insulation strips at a right angle on site.
y < 9 7/8”
y
Installation
90°
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Schöck Isokorb® Type CM Installation Manual
9 Before installing the Schöck Isokorb® Type CM, compare its entire type designation with the design drawing of the respective balcony. Hazard due to balcony slab not being properly supported! If the wrong type of Schöck Isokorb® is installed, the balcony slab could break off. 9
9A
CM
9B
Image 9A: Schöck Isokorb® Type CM must be installed in “TOP FACE” up position. If this is done correctly the “TOP FACE” sign is visible from above, and the tension bars are arranged in the upper layer. Image 9B: In case of the “Bottom” sign is visible from above, and the tension bars are arranged in the lower layer, the Schöck Isokorb® Type CM is installed falsely.
WARNING 0 Install Schöck Isokorb® Type CM flush to each other and at the correct height. Schöck Isokorb® Type CM must be cut at a right angle and exactly at midlength.
90°
10
ß All connection joints between Schöck Isokorb® Type CM components and adjacent thermal insulation strips or edge connections must be tight.
Installation
11
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Schöck Isokorb® Type CM Installation Manual
“ Ensure that any overlapping reinforcement required in compliance with the design drawing of the structural engineer is available on site. Image 12A: Install the required overlapping reinforcement on both sides of the Schöck Isokorb® Type CM with bar steel. If the bar size is not defined higher, select at least a minimum size of #3.
12
ls
„ Properly connect the overlapping reinforcement with the Schöck Isokorb® tension bars on site. Maintain a ≤ 0.2 x lS distance between the overlapping reinforcement and the Schöck Isokorb® Type CM tension bars as pictured.
ls
CM 12A
≤a
≤a
13
” Before placing the concrete, check for professional alignment of the Schöck Isokorb® Type CM and of the connecting reinforcement as well as the required concrete cover, in accordance with the design drawing of the structural engineer. To keep the Schöck Isokorb® component in place, ensure that the concrete is filled and compacted evenly on both sides.
If the Schöck Isokorb® type CM is installed, check the concrete for sufficient stability BEFORE removing the bracing from under the cantilevered balcony slab. 14
Installation
It is of the utmost importance that the concrete is checked for sufficient stability BEFORE the temporary bracing under the balcony slab is removed!
On-site modifications of the Isokorb impacts the safety of the product. Do not modify the Schöck Isokorb® on site and do not cut or bent its rebars. Schöck USA Inc. | +1-855 572 4625 | www.schock-us.com | Technical Manual Dec 2012
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Imprint: Publisher:
Schöck USA, Inc. 500 Fifth Avenue, #4810 New York, NY 10110 Telephone: 855 572 4625 info@schock-us.com www.schock-us.com
Date of issue:
December 2012
Copyright:
© 2012, Schöck USA, Inc. The contents of this document or extracts thereof may not be handed to third parties without the written permission of Schöck USA, Inc. All technical information, drawings etc. are subject to copyright law.
Right reserved to make technical changes. Publication date: December 2012
Schรถck USA, Inc. 500 Fifth Avenue, #4810 New York, NY 10110 Telephone: 855 572 4625 info@schock-us.com www.schock-us.com
12.2012/US/120234