Invitation to Tender Steelwork PUBLIC HOLDER
JAMES CLARK JUNE 2020
CONTENTS
P. 3
6
8
Steelwork | ITT | James Clark
1. OVERVIEW
PROJECT OVERVIEW
STEEL PACKAGE OVERVIEW
2. DESIGN INTENT
MANUFACTURING, BOLTING
STEEL FINISHES
3. TENDER DRAWINGS
GENERAL ARRANGEMENT
STEELWORK PACKAGE
36
4. SCOPE OF WORKS
37
5. SPECIFICATION
2
1. PROJECT OVERVIEW
B RO
RT SW AY
K RIC
Public Holder is a proposal of a mixed-use community infrastructure and public park on a post-gasworks site at Abbey Lane, Stratford.
RIC
KR
AY W
OB E
TS ER
The flexible infrastructure sits above the 10m high ground floor plane and courtyards, with three intermediate levels and an active public roof level. The infrastructure’s structure is two concrete cores, steel trusses framework, with aligned steel and concrete composite floors creating cantilevered floors.
AB BE Y
LA NE
The gasholder exoskeletons have already been dismantled on the site. The gasholder bases will be removed and infilled with soil. A level site plane allows for an expansive multi use public realm, focused on various sport and leisure activity.
Abbey Lane, Stratford
Site ground plan existing, proposed
GREENWAY
The invitation to tender package is for a skilled and experienced steel contractor to complete the bespoke manufacturing and construction of primary steel exoskeleton structural components which make up the building frame and façade, as well as other various secondary architectural steel elements in the building.
Structural model 1:200 showing intention of Architect
Steelwork | ITT | James Clark
3
1. PROJECT OVERVIEW
The maximum flexibility of each suspended floor is due to a structureless rectilinear grid, the threebay spanning steel structure organises nine clear floor zones with no wasted corridor circulation space. Within this grid a variety of different spaces can be reconfigured accordingly where users can rent and adapt spaces over time. The spaces for adjoining mixed-use community programmes can be such as cafĂŠs, a learning centre, a school, business spaces, hydroponics, a hostel. The steelwork will provide an exoskeleton for concrete composite floors with steel decking to be constructed upon, which will also include mild steel reinforcement to the concrete.
Axonometric with each programmatic floor
Steelwork | ITT | James Clark
Isometric with section cut line showing building and interior
4
1. STEEL PACKAGE OVERVIEW
The package sets out the following: - The design intent of both structural steel and secondary steel including the manufacturing, fixings and boltings construction and finishes. - Existing drawings - Demolition drawings - General arrangement drawings - Steel package drawings - The scope of works - Specification of steelwork The steelwork contractor will be responsible for the welding of structural components and also the smaller architectural elements. It is important that there is one framework of ownership, whereby steel elements may be manufactured by different companies but where the finish is being put through the same finishing bath, so there is continuity, so that steelwork has the same appearance. The same spray shop will complete the powder coating for continuity too. This package allows for a huge opportunity for a steel contractor to take full responsibility for all of the galvanized mild steelwork in the building. The successful construction of this project on this site may incrementally lead to more post-gasworks sites being developed, thus it is important for the comprehensive steelworks’ quality and worksmanship on this site to be of the highest level to make an impact.
Steelwork | ITT | James Clark
Macro - trusses exo-skeleton steelwork structure
Micro - secondary steelwork including ballustrades, staircases, roof steel playground frame
5
2. DESIGN INTENT MANUFACTURING, BOLTING
The prefabricated mild galvanized steelwork of the exoskeleton will be manufactured off-site as separate components, transported to and bolted on site. This allows for components to be transferred by lorry to the site in separate parts. This also allows for component parts to be of a series of standardised elements therefore made in faster duration of the same high quality. Galvanized steel component drawings will be made by the steel contractor after considering the Architect’s drawings and in discussion with the Architect. Welding of mild steel components will be in factory conditions off-site. There will be no welding on site as this is not the UK norm as it is unfavoured to health and safety regulations and quality concerns.
Leutschenbach school structural model showing intention
Leutschenbach school on-site construction by crane
Leutschenbach school off site manufactured steel components constructed on site
Bolted connection plates fastened on-site
Bolted connections highlight the tectonic fabric of the infrastructure, they will be exposed on junctions between component parts and inbetween SHS and IPE steel elements, please refer to drawings.
Steelwork | ITT | James Clark
6
2. DESIGN INTENT STEEL FINISHES
A polyester powder coated finish will provide a protective layer against fire, corrosion, rusting, abrasion, chipping, pealing and allows a long term lasting finish. It is a dry coating rather than wet paint leaving a really hard finish and acts as a longlasting colour finish to the steel. The structural mild steel PPC colour will be RAL 9010 like in Leutschenbach School by Christian Kerez. The secondary Architectural mild steel elements will have a colour of RAL 3022 salmon pink, like in the R7 Kings Cross by Morris & Company. These two precedents display the Architect’s intentions for finishes. A PPC powder coating will be applied to the structural exoskeleton on-site when the bolting has been undertaken. Powder coating will be applied to secondary steelwork like balustrades and circulation elements off-site in factory conditions before transporting to site.
Steelwork | ITT | James Clark
Leutschenbach school uses PPC powder coated RAL 9010 white on structural steel frame
Novartis Campus Forum 3 uses aluminium mullions on glass
R7 Kings Cross office building uses PPC powder coated RAL 3022 rose pink on balustrades (left)
Park n Play in Copenhagen uses rooftop playground steelwork
7
3. TENDER DRAWINGS REGISTER
GENERAL ARRANGEMENTS Existing Site Plan Existing Site Section Demolition Site Plan Demolition Site Section Proposed Site Location Plan Proposed Site Plan Proposed Ground Plan Proposed First Plan Proposed Second Plan Proposed Third Plan Proposed Roof Plan Proposed Elevations Proposed Sections
1:500 @ A3 1:500 @ A3 1:500 @ A3 1:500 @ A3 1:1000 @ A3 1:500 @ A3 1:250 @ A3 1:250 @ A3 1:250 @ A3 1:250 @ A3 1:250 @ A3 1:500 @ A3 1:500 @ A3
STEEL PACKAGE Central Bay 3D Structural Framework Isometric Structural Steel First Plan Structural Steel Second Plan Structural Steel Third Plan Steel Components Elevation Steel Component Junctions Facade Steel Junctions First Floor Facade Junction Typical Floor Facade Junction Secondary Steelwork Elements 3d Steel Balustrades Spiral Staircase
Steelwork | ITT | James Clark
1:250 @ A3 1:250 @ A3 1:250 @ A3 1:20 @ A3 1:20 @ A3 1:25 @ A3 1:20 @ A3 1:20 @ A3 1:20 @ A3 1:20 @ A3
8
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Existing Site Plan Tender June 2020 1:500 9
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Existing Site Section Tender June 2020 1:500 10
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Demolition Site Plan Tender June 2020 1:500 11
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Demolition Site Section Tender June 2020 1:500 12
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Proposed Site Location Plan Tender June 2020 1:1000 13
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Site Ground Floor Plan Tender June 2020 1:500 14
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Ground Floor Plan Tender June 2020 1:250 15
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford First Floor Plan Tender June 2020 1:250 16
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Second Floor Plan Tender June 2020 1:250 17
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Third Floor Plan Tender June 2020 1:250 18
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Roof Floor Plan Tender June 2020 1:250 19
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Elevations Tender June 2020 1:500 20
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Sections Tender June 2020 1:500 21
Steel retractable roof (by other retractable roof specialist)
Steel trusses (steel package, refer to drawings)
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE ARCHITECT.
ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Central Bay Tender June 2020 22
IPE I Beams 303 x 142mm (refer to plans for lengths)
Primary steel I beams
Truss 1
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
Truss 2
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE ARCHITECT.
ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Structural Steel Isometric Tender June 2020 23
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Structural Steel First Plan Tender June 2020 1:250 24
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Structural Steel Second Plan Tender June 2020 1:250 25
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Structural Steel Third Plan Tender June 2020 1:250 26
Steel Truss 1 (x4)
IPE 400 I Beam 10.1m (L) x2
IPE 330 I Beam 6.25m (L) x 24 IPE 400 I Beam 6.25m (L)
SHS 400 I Beam 11.2m (L)
SHS 200 Section 10.1m (L)
x 12
x 11
x 24
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Steel Truss 1 Components Tender June 2020 1:250 27
Steel Truss 2 (x2)
IPE 400 I Beam 10.1m (L) x2
IPE 330 I Beam 9m (L) x 12 IPE 400 I Beam 9m (L)
SHS 400 I Beam 13m (L)
SHS 200 Section 10.1m (L)
x6
x5
x 12
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Steel Truss 2 Components Tender June 2020 1:250 28
Detail 01 - Steel cross-junction plate
Detail 02 - Steel cross-junctions boltings
Detail 03 - Steel end cross-junction
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Structural Steel Junctions Tender June 2020 1:20 29
Balcony visual showing desired finishes
Detail 04 - Facade steel junctions
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE ARCHITECT.
ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
ALL DIMENSIONS IN MM.
James Clark
N London School of Architecture Steelwork | ITT | James Clark
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Facade Junctions Tender June 2020 1:50 30
Aluminium Panels
Detail 05 - Facade first floor steel junction
Ceiling aluminium panels visual showing desired finish
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Facade Junctions Tender June 2020 1:20 31
Steel IPE 400 I Beam
Detail 06 - Facade typical floor steel junction
Steel junctions visual showing desired finish
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Facade Junctions Tender June 2020 1:20 32
Detail 07 - steel balustrade detail 1
Detail 07 - Steel balustrade detail 1
Detail 08 - Steel balustrade detail 2
Steel balustrades visual showing desired finish
Detail 08 - steel balustrade detail 2
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Balustrade Junctions Tender June 2020 1:20 33
Detail 11- Steel playground frame (steel package as set out drawings)
Detail 09, 10 - Steel circular staircase (steel package)
Steel dogleg staircase (steel package as circular staircase drawings)
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE ARCHITECT.
ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Secondary Steel Tender June 2020 34
Detail 09 - Steel circular staircase bottom
Detail 10 - Steel circular staircase top
Circular staircase visual showing desired finish
James Clark
NOTES: DO NOTE THE SCALE OF DRAWING.
REPORT ALL DRAWING ERRORS AND DIMENSIONS TO THE
N
ARCHITECT. ALL DIMENSIONS TO BE CHECKED ON SITE BY THE CONTRACTOR.
Steelwork | ITT | James Clark
ALL DIMENSIONS IN MM.
London School of Architecture
Project: Client: Location: Drawing Title: Stage: Date: Scale:
Public Holder Newham Borough Council Abbey Lane, Stratford Circular Staircase Tender June 2020 1:20 35
4. SCOPE OF WORKS STEELWORK Ref.
This scope of works covers the manufacturing and construction of the steel frame and the secondary steel elements. This does not count for the other construction works of concrete foundations and cores which will be undertaken prior to the steel contractor starting on site.
Description 1 Preliminaries 1.1 INSURANCE 1. Contractors Public & Employer’s Liability (Injury to Persons or Property) 2. Clause 6.5.1 Non Negligence Cover - By Contractor to cover Employer’s Liability. Premium may need to be agreed on inspection of site by underwriters 1.2 3. Insurance of the proposed works. PLANT To contractor's discretion but including: 1. Tower cranes and all necessary lifting devices 2. MEWPs (Mobile Elevating Work Platforms) 1.3 1.4 CRANE OPERATION 1.5 HOISTS 1.6 SPECIAL ACCESS EQUIPMENT 1.7 LABOUR & SITE FOREMAN 1.8 SITE COMPOUND 1.9 SCAFFOLDING & ACCESS EQUIPMENT 1.10 WASTE REMOVAL FROM SITE 1.11 TEMPORARY POWER AND WATER 2 Design & Fabrication COLLABORATIVE DESIGN Detailed design of steel frame shall be done in collaboration with architect, structural engineer, fabricator and main contractor to ensure quality. Planning between parties shall ensure the safe and timely delivery of all 2.1 elements. DRAWINGS Detailed fabricator drawings shall be provided for approval by structural 2.2 engineer and architect. SCHEDULES Drawings and schedules for intended sequence and location of work shall be 2.3 provided to coordinate with the overall programme on site. FINISHES SAMPLES Material samples shall be prepared early in the design phase in order to test the patterns of weathering on different finishes, for approval by 2.4 architect. PROCURE FIXINGS 2.5 All metal accessories, shims and metal plates shall be procured. JIGS 2.6 Construct jigs for the required number and types of elements. MOCK-UP Construct full-size mock-up of a typical truss with boltings. To be installed on site for finish approval and testing of logistics, propping and handling. 2.7
Steelwork | ITT | James Clark
2.6 Construct jigs for the required number and types of elements. MOCK-UP Construct full-size mock-up of a typical truss with boltings. To be installed on site for finish approval and testing of logistics, propping and handling. 2.7 TESTING 2.8 Test the structural strength of fabricated samples. FABRICATION Fabricate steel frame elements in accordance with specification. This should be sequenced to start with ground floor base elements - both trusses and 2.9 columns - to allow for staggered delivery and reduce storage on site. TOLERANCES All elements shall be fabricated to tolerances set out in the 2.10 specification. FINISHES Allow for application of finishes TBC by architect. 2.11 3 Installation SITE DIMENSIONS Check all dimensions on site and report discrepancies to main 3.1 contractor. PREPARATORY WORK 3.2 Inspect preparatory work on site by others prior to installation. TRANSPORTATION 3.3 Allow for costs for on time transport to site. HANDLING & STORAGE Moving steel components with care and agility, protecting them from 3.4 damage. ERECTION 3.5 Steel frame erection from first to roof level. TEMPORARY PROPPING 3.6 Temporary propping with steel supports for steel truss frames. BOLTING 3.7 Allow for on-site bolting of steel components together. OTHER SUBCONTRACTORS Liaise with main contractor and specialist subcontractors allowing installation of other glazing and and steel concrete composite slab 3.8 elements supported by the steel frame. PROTECTION Provide required protection for all work undertaken and to avoid 3.9 damage. FINAL CLEANING 3.10 Provide a final cleaning to constructed steel frame. Final Handover SURVEY DRAWINGS Provide a final as-built survey document including elevations of completed 4.1 steel frame elements.
36
TESTING 2.8 Test the structural strength of fabricated samples.
5. SPECIFICATION STEELWORK
To be read with Preliminaries/ general conditions.
This specification covers the manufacturing of steel components, both structural and secondary elements. It covers the powder coating, supply to site and fabrication on site using boltings.
G10/ 180
G10
G10/ 190
STRUCTURAL STEEL FRAMING
- Design: Steel trusses as an exo-skeleton framework as designed to BS EN 1993, primary steel I beams connecting from trusses. Each floor’s structural steel varies in plan (refer see drawings). Secondary steelwork including the design of balustrades, staircases, roof steel frame. - All steel is to be procured through the same foundry batch for continuity. - Design responsibility: Contractor to provide drawings responding to the Architect’s intentions including junctions, detailing, connections. - Steel grade: S275. - Loading requirements: As specified or otherwise calculable. G10/ 115
BOLTINGS GENERAL
Boltings: - Diameter: 20mm. - No. per connection: 150mm spacing on steel components. Varies per steel member (refer to drawings). - Preparation for application of coatings. - General: Fabrication complete, and fixing holes drilled before applying coatings. Paint, grease, flux, rust, burrs and sharp arises.
- Refer to drawings.
- Notice: Give notice before fabrication is due to start. - Period of notice (minimum): 28 days.
DRAWINGS AND CALCULATIONS
- Information: Engineers structural report to provide contractor amended fabrication drawings G10/123 Drawings and calculations prepared by Contractor. - Information required: General Arrangement and Fabrication drawings and schedules required General arrangement drawings: Submit before preparing calculations. Identify clearly: - Steel components and numbers (please see drawings). - Conflicts with other sub-contractors’ work. - Proposed changes to tender drawings. - Junctions and loads: Submit before preparing fabrication drawings. - Source: Obtain steel from a source accredited to a national or internationally accepted quality standard. G10/ 135
HOLLOW STEEL SECTIONS
- SHS 400, SHS 200 Sections (as well as IPE I Beams): - Grade: S275. - Source: Obtain steel from a source accredited to a national or internationally accepted quality standard. Steelwork | ITT | James Clark
MARKING
- Submit details of proposed methods. - Steel to be blast cleaned: Marked so that subsequent treatment cannot obliterate the marking. G10/ 195
HARD STAMPING
- Usage: Not permitted except as indicated on drawings.
G10/ 210
END PLATES
- End plates, gusset plates, thermal breaks, carried out in accordance with BS EN 1994-2. - Refer to drawings.
G10/ 255
OFF-SITE WELDING
- Suitable and safe workable conditions. Do not work or weld when surfaces are wet or with temperatures below 0°C. G10/ 270
G10/ 120
NOTIFICATION OF COMMENCEMENT
- Welds not indicated on drawings, not permitted without approval.
G10/ 280
SHEAR CONNECTIONS
- Carried out in accordance with BS EN 1994-2. - Connector type: Angle/plate. - Size: 550mm. - To be compatible with steel composite decking.
G10/ 405
ADDITIONAL WELDS
METHOD OF ERECTION
As outlined in design principles document: - Once site conditions are made safe and ready for construction, do the following: - Site vehicle access. - Piling foundations and concrete works by contractor. - Steel standardised components transferred to site and left in safe conditions. - Steel elements lifted into place by crane. 37
- Steel elements are attached to concrete cores. - Steel elements are bolted together as per drawings. - Removal of steel tressles which held steel in place. - Secondary steelwork can be carried and constructed inside building with PPC powder coating.
G10/ 420
SETTING OUT
- Allow for tolerances of only 5mm either side. If over must consult with Architect and the structural engineer prior to constructing. G10/ 425
MODIFICATIONS
- All secondary steelwork shall be provided with a spray system of a primer and undercoat which satisfies the requirements of BS 5493:1997. The selected primer system subject to Engineer’s approval. - Classification: 50 years+ lifespan. - Location: Secondary architectural steelwork elements, please refer to drawings. G10/ 661
- Polyester power coat RAL 9010 (Pure White) - All primary steelwork shall be provided with a spray system of a primer and undercoat which satisfies the requirements of BS 5493:1997. The selected primer system subject to Engineer’s approval. - Classification: 50 years+ lifespan. - Location: Primary steelwork elements, please refer to drawings. G10/ 725
- Steelwork: Do not modify without approval.
G10/ 432
- Design: Cross bracing at bays. - Design responsibility: To Engineer’s approval.
G10/ 445
MOVEMENT JOINTS
- Coated with molybdenum disulfide grease before connecting. - Design: Bolts centred in slotted holes. Joints free to move.
G10/ 450
TEMPORARY SUPPORT
FIXING PROFILED SHEET FOR FLOOR SLABS
- Standard: Do not modify without approval. - Fixing method: To Engineer’s approval.
G10/ 465
TESTING
G10/ 472
TESTING AUTHORITY
- Arrange testing with structural steel components, secondary steelwork and testing to finishes when primer and coatings have been applied. Report back to Architect with results prior to commencement.
G10/740
MANUAL CLEANING OF NEW STEELWORK
- Preparation: Remove sharp edges, rust and loose scale. - Finish: Clean to BS EN ISO 8501-1, grade St 2. - Finishing: Degrease and clean down. BOLTED JOINTS (OTHER THAN FRICTION GRIP JOINTS)
- PPC powder coatings: Apply to welded areas to match surrounding powder coated steelwork.
G10/ 810
POWDER COATING ENVIRONMENTAL CONDITIONS
- General requirements prior to starting coating work: - Surfaces: Unaffected by moisture or frost. - Steel temperature: At least 3°C above dew point, with conditions stable or improving, and not high enough to cause blistering or wrinkling of the coating. - Relative humidity: Below 85%. G10/ 815
COATINGS GENERAL
- Final finishes: PPC powder coating as RAL 9010 for structural steelwork, RAL 3022 for secondary Architectural steelwork. Refer to drawings. - Primer Coating: Zinc Rich Epoxy Primer. - Surfaces: Clean, dust free and suitably dry. Previous coats to be adequately cured. - Multiple coats of same material: - Penultimate coat: Colour recommended by paint manufacturer to suit top coat colour. - Finish required: Smooth and even, of uniform thickness and colour, free from defects.
- Tests to carry out with approved independent testing authority. G10/ 850
G10/ 641
SITE SPRAYING
SHOP SPRAYING
- Polyester powder coat RAL 3022 (Salmon Pink)
Steelwork | ITT | James Clark
JUNCTIONS WITH CONCRETE
- Exposed steelwork partially embedded or encased in concrete: Apply two coats of bituminous coating locally to the steel/ concrete junction. 38
G30
METAL PROFILED SHEET DECKING
- Manufacturer: Tata Steel. - Product reference: ComFlor® 46. - Material: Galvanized steel sheet to BS EN 10326. - Thickness: 1.20. - Metal accessories: Provided by sheet manufacturer unless indicated otherwise. - Finish: As sheet.
L30
STAIRS LADDERS AND BALUSTRADES
- Design: Steel staircases as designed to BS 5395-1 for dogleg stairs, and to BS 5395-2 for circular staircases. - Design responsibility: Drawings responding to the Architect’s intentions and refer to drawings. Z11
PURPOSE MADE STEELWORK
- PPC powder organic coatings to galvanized steel for external architectural purposes: To BS 6497 or BS EN 13438. - Finished metal: Do not damage or alter appearance of finish. - Preferred method: Metal arc welding. To be discussed with Architect in conjunction with Architect’s drawings. - 20mm, 40mm, 50mm secondary steelwork elements, refer to drawings.
Steelwork | ITT | James Clark
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