Design Element: C8 - Steel SHS stanchions supporting glass panel infill

Steel SHS stanchions supporting glass panel infill

C8

design elements

40

Stainless steel SHS stanchions support glass infill panels on through-glass patch-fittings in this design. Off-stand cylindrical bodies may be extended so as to allow the glass to overhang the edge of the void or staircase.

The neutral tones of stainless steel and glass combine easily with a variety of other materials, such as timber or stone. Handrail (50.8mm CHS typical) is generally mounted vertically on a mounting pin above the stanchion, so that the handrail and stanchion centrelines coincide. The Arden C8 balustrade design offers the flexibility to complement many types of staircase or balustrade configuration, resulting in a clean, crisp and modern finish.

100

100

Min 1000

Steel SHS stanchions supporting glass panel infill

design

40

50mm 304G SHS stainless steel stanchion with welded and ground end-caps.

12-15mm toughened or 12.76-17.52 toughened laminated glass depending on AS1170 design load, span and glass location

1A

SHS end-cap welded and polished smooth

Glass and stainless steel provide strength and durability, ensuring that there are few limitations for architects and designers wishing to realise dramatic and dynamic infill designs.

Min 50 clear (AS1428.1 Compliant)

A

Line of toughened or laminated toughened glass

Interlinking handrail (AS1288.2006 compliant) (typically stainless steel CHS or Timber over ribbon plate)

The high transparency and the neutral textures of the C8 design can also allow the balustrade to retreat visually, if necessary.

A50D or A38D Patch fitting with handrail offstand (Refer to A50D or A38D Arden System A patch fittings for detail) 50mm 304G SHS stainless steel stanchion with welded and ground end-caps.

Line of toughened or laminated toughened glass Line of stanchions A50D or A38D series patch fittings (Refer to A50D or A38D Arden System A patch fittings for detail) Optional floor edge trim

C8

B Floor coverings (carpet/other) Structural floor surface Void Bulkhead Plasterboard celling on battens

1B

2

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SHS end-cap welded and polished smooth

2

SHS end-cap welded and polished smooth Min 50 clear (AS1428.1 Compliant)

1A. Front elevation

Interlinking handrail (AS1288.2006 compliant) (typically stainless steel CHS or Timber over ribbon plate)

1B. Side elevation 1C. Through-glass handrail mount detail

ď Ž50ď €

A50D or A38D Patch fitting with handrail offstand (Refer to A50D or A38D Arden System A patch fittings for detail) Line of toughened or laminated toughened glass 12-15mm

1C

F indicated on dimensions denotes a nominal dimension that typically varies according to specific application, engineering requirements or client preferences.

A

3

Steel SHS stanchions supporting glass panel infill

Figure 1. Face-fixed C8 balustrade with handrail mounted on throughglass patch fittings.

40ď €

C8 design elements

3

M12-M16 chemset thread rods Passing through SHS stanchion and welded to the back of it

34 20

3

1D

B

150x8mm  offstand bar

Min 60

10-16mm steel fixing plate

Min 180mm

In terms of design then, the size and spacing of the stanchions are determined to suit the applicable balustrade load as defined by AS1170.12002 (Structural design actions), which defines the applicable loads for particular applications. The infill glass loads are also defined in the Australian Standard for the particular application and the sizing of the infill glass is then provided by AS1288-2006 (Glass in buildings, selection and installation).

21

The C8 balustrade style is essentially a stanchion based balustrade system with infill glass supported off patch fittings mounted on the stanchions. The primary balustrade loads are carried by the handrail directly to the stanchions, and not via the glass, which reduces the design criteria of the glass to effectively that of “infill glass” as opposed to structural glass.

M12-M16 chemset thread rods dependent upon spacing and AS1170 loads

1E

M12-M16 chemset thread rods dependent upon spacing and AS1170 loads

Min 60

C8

The C8 balustrade style can have a number of other variations that can be dependent upon the application environment, where the base materials may determine the style of stanchion fixing (e.g. void edge face fix as opposed to top fix) and may then also determine line of the stanchions relative to the void edge. Dependent upon preferences then, considerations such as the length of patch-fitting offstand may become a factor.

Min 100

Underslab braket

1F

4

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Non-shrink grout

Min 60

It should be noted then that the final design in terms of stanchion spacing may be determined by issues in respect to the handrail loads as well as the span of the infill glass.

Min 180

Steel SHS stanchions supporting glass panel infill

technical

5

1E. Heavy-duty fixing to concrete via concealed fixing plate and four chemical anchors 1F. Fixing to thin concrete slabs via under-slab bracket 1G. Bolted connection to LVL with cylindrical off-stand bodies Min 180

M12-M16 chemset thread rods dependent upon spacing and AS1170 loads

Void edge LVL

1G

F indicated on dimensions denotes a nominal dimension that typically varies according to specific application, engineering requirements or client preferences.

7

Steel SHS stanchions supporting glass panel infill

1D. Fixing to concrete via twin M12-M16 chemical anchors

C8 design elements

5

40 Actual offset at 100 client discretion

3mm  St or mild ste

2A. Side elevation

Stainless o steel string

2B. Isometric Figure 3. Corner detail of level section of C8 balustrade using radiused glass corners and bottom of glass terminating with clearance to floor coverings 40

Min 900

Figure 4. Elevation of stair with landing utilizing floor-fixed C8 balustrade with tipped-corner glass panels over-hanging the treads. The through-glass patch-fittings allow the glass to enclose the treads Actual offset at client discretion and landings, creating a unique impression.

A

100

3mm  Stainless A-A or mild steel

Figure 5. Front elevation of stair illustrating the optional extended patch-fitting bodies.

12-15mm toughened or 12.76-17.52 toughened laminated glass depending on AS1170 design load, span and glass location

A 50.8mm Nosing line

2A

100 

25x8mm sta steel offstan to stringer

40

Stainless or mild steel stringer

304G SHS stainless steel stanchion with welded and ground end-caps.

40

Min 900

Steel SHS stanchions supporting glass panel infill

Figure 2. Face-fixed C8 balustrade section with handrail mounted on through-glass patch fittings positioned on raking stringer.

A

25x8mm stainless steel offstand welded to stringer

A50D or A38D Patch fitting

A-A

100

40

Nosing line

A

SHS end-cap welded and polished smooth

12-15mm toughened or 12.76-17.52 toughened laminated glass depending on AS1170 design load, span and glass location

Interlinking handrail 50.8mm (AS1288.2006 compliant) 304G SHS stainless steel stanchion with welded and ground end-caps.

Stainless steel flat-bar handrail welded at top of the handrail support Handrail support welded at top of the SHS stanchion

50

2B

SHS end-cap welded and polished smooth

12-15mm toughened or 12.76-17.52 toughened laminated glass

C8

50mm 304G SHS stainless steel stanchion with welded and ground end-caps.

Specially desined to be placed at corners.

Stainless or mild steel stringer

ace ear sp 80 cl n glass ee tw be edges.

12-15mm toughened or 12.76-17.52 toughened laminated glass

9 F indicated on dimensions denotes a nominal dimension that typically varies according to specific application, engineering requirements or client preferences.

6

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3

SHS end-ca and polishe

50

40

Min 1000

12-15mm toughened or 12.76-17.52 toughened laminated glass depending on AS1170 design load, span and glass location

50 20

Min 900

Overal structural rise

10 Actual offset at client discretion 50mm 304G SHS stainless steel stanchion with welded and ground end-caps.

250 nominal tread going

Nosing line

Overal going determined by tread going

4

Min 50 clear (AS1428.1 Compliant)

11 Interlinking handrail (AS1288.2006 compliant) (typically stainless steel CHS or timber over ribbon plate)

Steel SHS stanchions supporting glass panel infill

20

Extended A50D or A38D Patch fitting (Refer to A50D or A38D Arden System A patch fittings for detail) Line of toughened or laminated toughened glass 50.8 304G SHS stainless steel stanchion with welded and ground end-caps.

Specially desined to be placed at corners.

5

Concrete tread

C8 12

design elements

7

Stainless steel CHS handrail welded at top of the handrail support

6A. Isometric 6B. Plan. At corners, one panel carries through to the rear-face of the other panel, setting the glass gap to be on one side or the other

Handrail support welded at top of the SHS stanchion SHS end-cap welded and polished smooth

Figure 7. Level balustrade section.

7A. Plan view

50.8mm 304G SHS stainless steel stanchion with welded and ground end-caps.

Specially desined to be placed at corners.

7B. Isometric Figure 8. Exterior corner section: isometric view

Extended A50D or A38D Patch fitting (Refer to A50D or A38D Arden System A patch fittings for detail)

12-15mm toughened or 12.76-17.52 toughened laminated glass depending on AS1170 design load, span and glass location

6A

Concrete tread

10mm (typical) base connection plate

13

5mm stainless steel covering plate

100

Steel SHS stanchions supporting glass panel infill

Figure 6. Interior corner section illustrating the interaction of glass and handrail lines between level and raking balustrade sections.

30

6B

100

C8

140

12-15mm toughened or 12.76-17.52 toughened laminated glass depending on AS1170 design load, span and glass location

12-15mm toughened or 12.76-17.52 toughened laminated glass depending on AS1170 design load, span and glass location

100

140

Inline

10mm (typical) base connection plate

F indicated on dimensions denotes a nominal dimension that typically varies according to specific application, engineering requirements or client preferences.

8

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5mm stainless steel cover plate

7A

14

Stainless steel SHS handrail

Handrail support

Handrail support welded at top of the SHS stanchion

SHS end-cap

SHS end-cap welded and polished smooth

50.8mm 304G SHS stainless steel stanchion with welded and ground end-caps.

304G SHS stainless steel stanchion with welded and ground end-caps.

Extended A50D or A38D Patch

Extended A50D or A38D Patch fitting

12-15mm toughened or 12.76-17.52 toughened laminated glass 12-15mm toughened or 12.76-17.52 toughened laminated glass

7B

8

15

Steel SHS stanchions supporting glass panel infill

Stainless steel SHS handrail

C8 design elements

9

Steel SHS stanchions supporting glass panel infill

infill glass panels This table shows the recommended maximum glass span (mm) depending on design load.

Design load Domestic/Residential

8

10

12

10

12

16

1640

2000

2300

1980

2290

2830

Offices/Commercial stairs

1070

1650

1930

1630

1920

2380

1140

1430

1730

1420

1720

2150

C5 high loads

Special glass engineering: designed as required

Notes 1. These tables are to be used as a general design guide only.

2. Individual project requirements will dictate final glass specification and thickness.

3. All spans nominated are indicative of normal internal conditions. In some exposed situations, wind loads may exceed design load and thicker glass or smaller spans may be required.

F

design standards for glass panels

glass balustrade styles

Glass balustrade panels must satisfy engineering requirements as specified in AS1288, and the Arden balustrade styles shown here are defined and specified with regard to the relevant design standards.

Cantilevered structural. Glass panels supporting an interlinking handrail cantilever from an appropriate floor fixing.

H

E

Of particular importance in the initial design stage, it is critical to maintain an awareness of the designation of glass panels as structural or infill, and the classification of handrail as loadsupporting, non-load-supporting, or interlinking. Combined with other considerations (e.g. whether or not mechanical point-fixings are specified, span is cantilevered or supported on both sides), this determines the grade of glass (e.g. laminated annealed, toughened safety, laminated toughened) and type of handrail that satisfies the code.

C8 G

As in other aspects of stair and balustrade design, Arden will advise with respect to the practicability of preliminary designs with respect to Australian standards.

Semi-framed lateral channel. Glass panels are fixed via proprietary or custom channel system on the bottom rail and underside of handrail.

Two-edge clasp. Glass panels are supported on two opposite edges by clasp-style mechanical fixings. The bearing of point loads influence the required grade of glass.

Semi-framed vertical channel. Glass panels are fixed via proprietary or custom channel system on each side.

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Two-side patch-fitting. Glass panels are supported on two opposite sides by through-glass mechanical fixings.

The bearing of point loads influence the required grade of glass. Stanchions may be located between, or at intermediate locations within, each panel span.

Fully framed. Glass panels are provided with four-edge support and are therefore rated as infill only.

C

10

Toughened laminated safety glass (mm)

Retail/Restaurant

A

B

Toughened monolithic safety glass (mm)

Hybrid. Glass panels are provided with a combination of the above methods so as to comply with safety requirements.

Intellectual property is copyright Š Archstairs Pty Ltd unless otherwise agreed in writing. All rights to the document are retained. Any use of the document by clients or third parties, unless specifically authorised by Archstairs Pty Ltd, are at their own risk and the user releases and indemnifies Archstairs Pty Ltd from and against all loss or damage arising from such use.

compliance Arden is a BSA licensed contractor for carpentry, joinery, glass, glazing and aluminium as well as structural metal fabrication and erection. Arden supplies a Form 16 (Licensed Contractor) on all projects. In design and construct contracts, a Form 15 (Design Engineer) certification is supplied upon request. For products and services incorporating the C8 system, this table shows compliance with relevant codes and standards.

Key full compliance with the code not applicable to this element

Code

Title

BCA

The Building Code of Australia

AS NZS 1170.1-2002

Structural Design Actions – Permanent, imposed and other actions

AS 1288-2006

Glass in Buildings. Selection and installation.

AS NZS 1554.1-2004

Structural steel welding - Welding of steel structures

AS 1554.6-1994

Welding stainless steels for structural purposes

AS NZS 4586-2004

Slip resistance classification of new pedestrian surface materials

AS 1428.1-2009

Design for access and mobility

AS 1657-1992

Fixed platforms, walkways, stairways & ladders. Design, construction and installation

Steel SHS stanchions supporting glass panel infill

About this document

Applicability

C8

design note For all commercial applications, it is important that sufficient space for the stairwell cavity be allowed to satisfy Australian Standards and BCA requirements.

The footprint is primarily driven by the floor to floor rise, as well as the staircase configuration chosen. However, stringer and balustrade style design may increase the amount of space required. Allowing too small a cavity can restrict the design options of the staircase. Also, points at where the staircase interacts with other structures are best addressed early in the design cycle.

Consultation with Arden early on will help ensure that these design issues can be addressed in a cost-effective manner.

design elements

11

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