S20 Metalwork and Stainless Steel

Note: The term contractor is used interchangeably to describe both subcontractors & suppliers

PART 1 GENERAL

1.0 Scope

  • 1.0.1 Supply, engineer and install all required general and architectural metal and stainless steel work items including but not limited to:
    • 1.0.1.1Balcony Railings and Gates Stair Railings
    • 1.0.1.2 Outdoor Deck Balustrade Awnings and Awning supports External and Internal handrails.

1.1 Related Work

  • 1.1.1 Close co-ordination is required with the following other trade sections:
    • 1.1.1.1 Masonry
    • 1.1.1.2 Carpentry
    • 1.1.1.3 Joinery
    • 1.1.1.4 Painting
    • 1.1.1.5 Concrete

1.2 Quality Assurance

  • 1.2.1 All work of this Section shall be performed by experienced craftsmen familiar with the quality required in this class of work.
  • 1.2.2 Provide metal fixtures that are undamaged, plumb, level, straight and free of surface defects or distortions.

1.3 References

  • 1.3.1 Comply with the current relevant Australian Standards.
  • 1.3.2 Pool Fence and Gates to comply with current relevant Australian Standard and NSW regulations relating to that Standard.

1.4 Building Code of Australia

  • 1.4.1 Class of Building is Class 1a
  • 1.4.2 Construction shall be carried out in accordance with the “Deemed-to-Satisfy Provisions” of the Building Code of Australia.
  • 1.4.3 Balustrades and handrails to conform with the BCA, in particular “Where floor level is greater than 4 metres above the surface beneath balustrade must not facilitate climbing”.
  • 1.4.4 Contractor to ensure that balustrades comply with the BCA in all respects prior to fabrication and after installation.

1.5 Shop Drawings

  • 1.5.1 Provide shop drawings for all major items supplied hereunder.
  • 1.5.2 Drawings and details provided are indicative as to general and minimum requirements, and do not show all conditions.
  • 1.5.3 The Contractor shall develop all details not shown and in conformance with the indicative details shown.
  • 1.5.4 Fabricator shall measure and confirm all dimensions on site.
  • 1.5.5 Submit detailed shop drawings for fabrication and installation of major metalwork.
  • 1.5.6 Show plans, elevations and detailed sections; indicate all materials, finishes, types of joinery, fasteners, anchorages and accessory items.
  • 1.5.7 Provide setting diagrams and full-scale templates of blocking, anchorages, sleeves and bolts installed by others.

1.6 Samples

  • 1.6.1 Sample Welds: Provide samples of weld types, including samples of railings joined at right angles and at typical acute angles, welded and ground smooth, for approval.
  • 1.6.2 If not acceptable, provide additional samples until approved. When approved, samples shall establish quality of all similar work of this Section.
  • 1.6.3 Check on delivery: Principal shall check all materials on delivery to site for quality, and shall reject any materials not meeting the requirements of this Specification or equal to approved samples.
  • 1.6.4 Rejected materials shall be returned to the Fabricator at the Fabricator’s expense.

1.7 Stainless Steel

  • 1.7.1 Minimum grade 3161
  • 1.7.2 Polished finish using 320 grit abrasives or finer to achieve a finish equal to or better than 0.5 micrometers Ra.
  • 1.7.3 Welds to comply with current relevant Australian Standard Class B, Polished to a grade A finish using 320 grit abrasive or finer.
  • 1.7.4 Sheet thicknesses and finish in accordance with manufacturer’s recommendations for specific applications.

PART II MATERIALS

2.0 Materials

  • 2.0.1 As documented on the drawings and in the Finishes Schedules.

2.1 Finish

  • 2.1.1 All ferrous metalwork related to this section shall be hot dip galvanised after fabrication.

2.2 Preparation for site paintwork after fabrication.

  • 2.2.1 Sound coatings tightly adhering to substrate exhibiting no more than dirt pick-up, loss of gloss, chalking or staining shall be washed with an alkaline detergent and rinsed with fresh potable water. Repeat until the surface is clean. A clean surface is indicated when the rinsing water wets out the surface instead of beading on the surface.
  • 2.2.2 Ensure that all coatings are tightly adhering to the substrate by crosshatch adhesion test if existing coating fails adhesion test, it must be removed.
  • 2.2.3 Abrade surface to remove gloss and chalkiness, to achieve a smooth, even, sound surface and to provide a good key for the new coating system. Dust off.
  • 2.2.4 Complete removal of heavy chalky buildup may require wire brush or power tool cleaning back to sound paint layers before sanding.
  • 2.2.5 Apply coating system as soon as possible and before surface becomes recontaminated.

2.3 Painting System

  • 2.3.1 Dulux Spec Code AUSI3393
Data Sheet Dry Film Thickness (microns) Theoretical Spreading Rate*

(sq/ mtrs per litre)

Recoat**
Primer
DULUX
Durebild STE – PC237 DL1109 Min 100 8.3 14 hours
Brush, Roller, Conventional & Airless Spray Max 210 4.0 4 weeks
Do not Use Cold Cure hardener.
Intermediate
DULUX
Durebild STE MIO – PC565 DL1111 Min 100 8.3 14 hours
Brush, Roller, Conventional or Airless Spray Max 210 4.0 4 weeks
Do not Use Cold Cure hardener.
Top Coat
DULUX
Weathermax HBR – PC405 DL1156 Min 75 9.1 10 hours
Brush, Roller, Conventional, Airless or Air Assisted Spray Max 125 5.6 Indefinite
If application is by brush or roller, further coats may be necessary to achieve the recommended Dry Film Thickness and full opacity.
Practical Spreading Rate will vary from the quoted Theoretical Spreading Rate due to factors such as method and condition of application and surface roughness.** Recoat times are quoted for 25°C and 50% Relative humidity, these may vary under different conditions.

2.4 Welding

  • 2.4.1 General: Details of all joints, the techniques of welding employed, the appearance and quality of welds made and the methods used to correct defective work shall conform to requirements of relevant Australian Standard.
  • 2.4.2 All welding shall be continuous.
  • 2.4.3 Tack welding or skip welding will NOT be permitted where items are to be galvanised.
  • 2.4.4 All exposed-to-view welds shall be ground smooth.
  • 2.4.5 Non-exposed-to-view welds, where uneven or rough, shall be ground smooth to ensure uniform galvanised.
  • 2.4.6 All weld spatter shall be chipped off smooth or ground smooth. Grinding of welds shall be subject to the approval or the Principal.

2.5 Connection Design

  • 2.5.1 External Items: Design shall conform to the recommendations of the relevant Australian Standard.
  • 2.5.2 Complete Design: Design of connections not indicated on the drawings shall be completed and indicated on the shop drawings.
  • 2.5.3 Flanges: Concealed where possible. Except where access is impossible, connection screws and bolts shall be on the underside of joints.
  • 2.5.4 Shop connections for steel fabrications shall be welded, and field connections bolted.
  • 2.5.5 Exposed surfaces shall have a smooth finish with sharp well-defined lines and arises.
  • Machined joints shall be milled to a close fit.
  • 2.5.6 Design all necessary lugs, brackets and similar items so that work can be assembled and installed in a neat, substantial manner.
  • 2.5.7 Thickness of metal and details of assembly and supports shall be such as to provide ample strength and stiffness.
  • 2.5.8 Provide holes and connections as required to accommodate the work of other trades and for site assembly of metalwork.
  • 2.5.9 Holes shall be drilled or punched and reamed in the shop. Joints and connections shall be formed to exclude water and to permit draining during galvanising.

2.6 Miscellaneous

  • 2.6.1 Fasteners: Provide all required bolts, screws, inserts, fasteners, templates and other accessories required for a complete installation.
  • 2.6.2 Co-ordinate with Engineer as to the proper fastening systems suitable for the substrates to which the item is to be secured.
  • 2.6.3 Fasteners for galvanised items shall be galvanised.

PART III EXECUTION

3.0 Examination

  • 3.01 Inspect site conditions before fabrication, where possible, and before delivery of materials. Ensure all conditions are satisfactory for installation.

3.1 Preparation

  • 3.1.1 Field measurements: Take field measurements prior to preparation of shop drawings and fabrication, where possible, to ensure proper fitting of work.
    • 3.1.1.1 Do not delay job progress.
    • 3.1.1.2 Allow for adjustments and fitting of the work in the field where taking or measurements might cause delay.

3.2 Inspection and Reinstatement

  • 3.2.1 All fabrications shall be checked as they are unloaded at the project site for evidence of any physical damage.
  • 3.2.2 Damaged fabrications shall be treated as follows:
    • 3.2.2.1 Damage through galvanising: Noted and set aside for immediate cold-galvanising repair. Do not install until reinstated.
    • 3.2.2.2 Architectural metalwork: Returned to shop for repair or replacement.
    • 3.2.2.3 Galvanising Reinstatement: Repair per manufacturer’s directions.
    • 3.2.2.4 Note: Items having galvanising as finish require particular care as unacceptable visual repair may cause rejection of whole item.

3.3 Installation

  • 3.3.1 Errors in shop fabrication or deformations resulting from handling and transportation that prevent the proper assembly and fitting of parts shall be corrected, at no additional cost, to approved methods.
  • 3.3.2 Anchors, bolts and other required anchorage items shall be verified for proper size and accurate location prior to erection.
  • 3.3.3. Anchorage: Except for anchorages furnished herein but placed by others, set and secure all necessary anchorages, including concrete and masonry inserts, bolts, wood screws and other connectors as needed. Perform all cutting, drilling and fitting as needed, locating anchorages and holes to ensure proper positioning of completed work.
  • 3.3.4 Fit: During installation and assembly, form tight joints with exposed connections accurately fitted, and reveals uniform. Finished work shall be accurately located, plumb, level, square and true in reference to adjacent construction.
  • 3.3.5 Finish: Do not cut or abrade shop finishes which cannot be completely restored in the field. Return items with damaged finish to the shop for full restoration, or else provide new replacement items of undamaged and matching finish.
  • 3.3.6 All members shall be aligned, leveled and adjusted accurately prior to final fastening. Tolerances shall conform to current relevant Australian Standards.
  • 3.3.7 The use of gas-cutting torch in the field for correcting fabrication errors will not be permitted under any conditions. Too-long fabrications may be cut shorter with power hacksaws on site.
  • 3.3.8 Isolate all dissimilar metals likely to be subject to moisture or electrolytic reaction.

3.4 Protection

  • 3.4.1 Cover Work: Immediately following installation, wrap or cover architectural metalwork to avoid wear and tear of finish during subsequent construction.

3.5 Allow For:

  • 3.5.1 Complying with all requirements set out in this Specification.
  • 3.5.2 All fabrication work, delivery, unloading, handling, hoisting, fitting and fixing in position and all cutting, notching, etc., welding and grinding off smooth and buffing up shop priming protective coatings and for submitting shop drawings and details for approval.
  • 3.5.3 Preparation of metalwork as the Specification and shop prime painting including touching up coat on site.
  • 3.5.4 Isolation of differing materials.
  • 3.5.5 Provision of all samples and prototypes required.

3.6 Cleaning

  • 3.6.1 Clean all materials installed to the satisfaction of the Architect Remove all temporary protective coatings.

3.7 Completion

  • 3.7.1 Complete all contracted work in accordance with contract documents and written variation orders issued by the Structural Engineer, Principal or Building Supervisor.

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