SECTION 31 ACCESS FLOORS

Transcription

1 SECTION 31 ACCESS FLOORS 1 GENERAL 1.1 OVERVIEW OF ACCESS FLOORS SECTION General description Work under this section includes, but is not necessarily limited to, the supply and installation of proprietary access flooring to the Communications Room as described in this specification or shown on the drawings or otherwise indicated as forming part of the Works. Miscellaneous items and work practices normally associated with or necessary for the proper completion of access floor systems shall be deemed included in the Contract Sum, whether or not such items and work practices are specifically described or shown in the documents. 1.2 CROSS REFERENCES General Conform to the General requirements worksection. Related worksections Conform to associated worksections as follows: - Adhesives Sealants & Fasteners, Metals & Prefinishes, Block Construction, Resilient Finishes and Electronic Services 1.3 STANDARDS General Access floors: To AS PERFORMANCE Stability General: Provide a completed floor system which is rigid, free from vibration, creep, squeaking, and the like, which has a smooth and uniform finished surface, and which will maintain these conditions when sufficient panels have been removed for normal access. Air tightness of air plenums General: Provide an edge to edge fit of the panels which is air tight within the following limits: - Maximum: 2mm Dimensional tolerances of installations Horizontal dimensions (mm): - Maximum deviation from true floor grid: 5mm - Maximum deviation of a grid line from straight: 5mm Structural loading Structural design actions: Provide an access floor system which is capable of carrying twice the uniform and concentrated loads without failure. 2 QUALITY 2.1 INSPECTION Witness points Give sufficient notice so that the following may be inspected: - Subfloor services installed before access floor installation. - Floor panels placed before surface covering, if not integral. November 2007 Page 31/1 Project No /43485

2 2.2 TESTS Fire rating Testing to AS/NZS : Required. Dimensional tolerances Testing to AS : Required. Testing to AS : Required. Testing to AS : Required. Electrical resistance of computer access floors Testing to AS : Required. Structure Testing to AS : Required. Testing to AS : Required. Testing to AS : Required. Testing to AS : Required. Testing to AS : Required. Testing to AS : Required. Testing to AS : Required. Testing to AS : Required. 2.3 SUBMISSIONS Subcontractors Submit the names and contact details of proposed suppliers and installers. Tests Testing authority reports: For electrical resistance, use the form given in AS 2834 Appendix D. Manufacturers data Manufacturer s data: Submit manufacturer s published product data including diagrams and illustrations. Before commencing to install access floor systems, submit the manufacturers published information for: - properties of materials / systems generally, including physical characteristics, dimensional tolerances, strength, resistance to static electricity, fire and like hazards. Installers data Before commencing to install access floor systems, submit written confirmation of: manufacturers approval of firm(s) carrying out the installations (where warranties are conditional on approval of installers); and - installers acceptance of substrates as satisfactory for receiving the installations. Operating and maintenance manuals On completion, submit the following information where applicable, bound together as described in the GENERAL CONDITIONS section: - names and addresses of the manufacturers / suppliers and installers of each access floor type; - copies of the manufacturers and installers data as described above; - independent testing authority reports of factory or type tests showing product compliance with the specified performance criteria; November 2007 Page 31/2 Project No /43485

3 - manufacturers, installers and Contractor s warranties certifying that access floor systems comply with the requirements and are suitable for the specified applications; and - recommendations for care and maintenance of access floors and associated components used in the Works, including instructions for panel removal and height adjustment with specific information on:. limitation on adjustability,. installed mass of system per square metre,. maximum number and positions of panels that may be temporarily removed during servicing without endangering safety of floor system,. method of cleaning of floor covering with particular reference to adhesives and panel substrate, wet mopping, and use of waxes and floor polishes, and. equipotential bonding method. Tests Testing authority reports: For electrical resistance, use the form given in AS 2834 Appendix D. 2.4 WARRANTIES Manufacturers warranties Manufacturers and installers guarantees and/or warranties shall apply to access floor systems specified or otherwise approved for use in the Works. Manufacturer s warranty: Minimum 5 years from the Date of Practical Completion. Contractor s warranties Access floor systems and associated components shall be supplied and fixed in full accordance with manufacturers and installers guarantee and warranty terms and conditions, and as per the GENERAL REQUIREMENTS and this section of the specification. The Contractor shall provide written certification to this effect at Practical Completion and shall also warrant completed installations against defects in materials and workmanship. Warranty period: 5 years from the Date of Practical Completion. 3 COMPONENTS 3.1 MATERIALS GENERALLY Finishes Steel elements: Galvanized. - Coating class for sheet: At least Z350. Panels: Unless otherwise nominated, provide factory-bonded integral floor finishes to panels. Preserve the conductive properties of the panels when installing separate floor finishes. Underside facing: Non-combustible. Sealing Provide vermin sealing of underfloor spaces. 3.2 PEDESTALS Description Provide access floors with matching substructure to securely support floor panels and imposed loads, while permitting necessary removal and reinstatement of panels as required. Proprietary item: Access (Australia) Tasman TC1000 or approved equivalent stringerless access floor system flush-mounted across the recessed concrete slab surface (nominal mm depth). November 2007 Page 31/3 Project No /43485

4 Adjustable floors General: Incorporate in each unit a means of height adjustment within the limits specified, without requiring rotation of the head, and a means of locking the adjustment to prevent accidental displacement. Fire rating Non-combustible, made using materials with melting point 350 C. Location Under every corner of every panel. 3.3 FLOOR PANELS Description Panels shall consist of corrosion-resistant steel top and bottom sheets factory -bonded to cores of mediumdensity fibreboard, in configurations generally as tabled: Panels location As indicated on drawings Coordinating Size (mm) Thickness (mm) Max. Weight Panel Finish 600 x kg Factory-bonded anti-static highpressure laminate Cut outs General: Provide cut outs for cable access and air grilles as necessary. Edge cut outs: Provide stringer or pedestal, or both, support. Omitted panels: Permanently omitted panels are not permitted. Labelling Non-standard panels: Identify for relocation purposes. Service identification labels: Provide self-adhesive labels identifying services and their direction. Fix to the visible surface of the floor panel, and under carpet finish if any. 3.4 ACCESSORIES Lifting devices General: Required. Number: 2 Marking: If panels must not be lifted from the side, mark lifting devices Lift panel vertically at centre. 4 FINISHES 4.1 FINISHES Panels Integral floor finishes: Required. - Material: High pressure laminate. - Surface treatment: Preserve conductive properties of floor surface. Underside facing: Non-combustible. Underfloor Corrosion-resistant finish to metal understructure. Sealing Perimeter gap sealing method: Compressible closed cell foam tape. Vermin sealing of underfloor space: Required. November 2007 Page 31/4 Project No /43485

5 Subfloor surface treatment Seal to prevent moisture ingress to subfloor. 5 EXECUTION 5.1 INSTALLATION Protection Provide temporary protection from surface damage and concentrated loads, during installation of access floor and of items which it supports. Site cutting Provide edge trim to site cut panels. Cleaning Vacuum underfloor areas before and after installation to remove all dust, metal filings and the like. Clean the access floor thoroughly before further fitting-out of the room. 6 COMPLETION 6.1 COMPLETION Maintenance manual General: On completion, submit bound recommendations for the care and maintenance of the access floor, and operating instructions for panel removal and height adjustment. Contents: Include the following information: - Limitation on maximum and minimum height of floor, cross-bracings, stringers or additional pedestal fixings required above a particular height. - Limitation on adjustability. - Installed mass of system per square metre. - Maximum number and positions of panels that may be temporarily removed during servicing without endangering safety of floor system. - Method of cleaning of floor covering with particular reference to adhesives and panel substrate, wet mopping, and use of waxes and floor polishes. - Equipotential bonding method. Spares General: Supply pedestals, stringers and uncut floor panels (including finishes) of each type at a rate of 2% of total installation. Storage location: Store components in locations on site as directed by the Superintendent. Making good Corrosion: Replace corroded elements. Replace elements or components scratched, defaced or otherwise damaged. Cleaning General: Clean access floor thoroughly, before delivery of items which it supports. Air plenum: Vacuum underfloor area so it is free of dust, metal filings and the like. November 2007 Page 31/5 Project No /43485

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