Highway House Palmerston NT 0830 PO Box 61 Palmerston NT 0831 ABOUT THIS SPECIFICATION This document was prepared by the Department of Planning and Infrastructure, and specifies the general standards of materials and workmanship required by the Department for small building works including services and landscape.
INFORMATION For further information regarding this Standard Specification for Small Building Works contact: Lawrie Foscaro – Manager Technical Specifications Department of Planning and Infrastructure Construction Division Highway House Telephone: (08) 8946 5021 PO Box 61 Facsimile: (08) 8999 4796 Palmerston Email: lawrence.foscaro@nt.gov.
STANDARD SPECIFICATION FOR SMALL BUILDING WORKS REFERENCE TEXT 2009 REFERENCE: Read this Standard Specification in conjunction with the Project Specific Requirements and Drawings if any. Only those parts of the Standard Specification which refer to the works being carried out apply. This document may be used as a blanket reference specification referring generally to the standards of materials and workmanship required by the Department for small building works including services and landscape.
STANDARD SPECIFICATION FOR SMALL BUILDING WORKS REFERENCE TEXT 2009 Contents 1. GENERAL REQUIREMENTS...............................................................................................5 2. SITE PREPARATION ..........................................................................................................6 3. CONCRETE CONSTRUCTION........................................................................................... 9 4. TIMBER AND STEEL CONSTRUCTION.............................
GENERAL REQUIREMENTS 1. GENERAL REQUIREMENTS 1.1 GENERAL Interpretation Supply: Supply only - do not install. Provide: Supply and install. Required: Required by the contract documents or by the local council or statutory authorities. Proprietary: Identifiable by naming the manufacturer, supplier, installer, trade name, brand name, catalogue or reference number.
SITE PREPARATION B1.4 (i) and AS 3660.1 Appendix A. Generally fix to the inside of the door to the electricity meter box. Surveyor’s certificate If requested by the Superintendent provide a certificate which confirms that the work, including boundary fences, has been correctly located. Services layout Give the Superintendent a plan which shows the location of underground services as installed. Use the same format as the contract drawings.
SITE PREPARATION Protection Protect from damage trees which are required to remain. Do not remove topsoil from the area within the dripline of the trees and keep this area free of construction material and debris. Excavation If excavating near trees required to remain, use hand methods to locate, expose and cleanly remove the roots on the line of excavation.
SITE PREPARATION A.S. METRIC SIEVE PERCENTAGE PASSING BY WEIGHT 75.0 mm 100 9.50 mm 30 - 100 2.36 mm 15 - 65 0.075 mm 5 - 25 Liquid Limit Maximum 35% Plasticity Index Maximum 12% Linear Shrinkage (Passing 04.25 mm) 6% Maximum C.B.R. - 4 day soaked Minimum 40 at 95% MMDD at 2.5 mm penetration Locations Use select fill under concrete building slabs and paving and general fill in other areas.
CONCRETE CONSTRUCTION 3. CONCRETE CONSTRUCTION 3.1 GENERAL Cross reference Refer to the General Requirements section for termite protection. Standards Concrete structures generally: To AS 3600 & AS 3610. Plywood Formwork: To AS 6669. Ground slabs and footings: To AS 2870 where appropriate. Reinforcement: To AS/NZS 4671. Deformed Ribbed Bar: Normal ductility class, strength grade 500 MPa, unless otherwise noted. Round Bars: Normal ductility class, strength grade 250 MPa.
CONCRETE CONSTRUCTION Concrete Grade Footings - N25 Exposed slabs on ground - N32 Internal slabs on ground - N25 Columns & suspended slabs - N40 Other concrete grades may be required as shown on the drawings or in the Project Schedules. Grout for blockwork cores Standard: AS 3700 clause 10.7. Grout: Class S12 (to AS 1379) 12 MPa with a pourable slump, a minimum cement content of 300 kg/m3 and maximum 6 mm aggregate.
TIMBER & STEEL CONSTRUCTION Sponge finish After screeding and finishing with a steel trowel obtain and even textured sand finish by wiping the surface with a damp sponge. Broom finish After floating use a broom to produce an even textured slip-resistant surface. 3.11 MISCELLANEOUS ITEMS Concrete strength: 25 MPa. Clothes hoist footing: 400 deep x 250 diameter with a 300 x 300 x 75 mm thick concrete surround above the finished ground line weathered away from the post.
TIMBER & STEEL CONSTRUCTION Temporary connections - Hold Point Hold Point: Do not attach cleats without approval. Remove temporary cleats on completion and restore the surface. Enlargement of bolt holes - Hold Point Hold Point: Do not hand flame cut or otherwise enlarge any bolt holes without approval. Bolts Use Grade 4.6/S bolts unless otherwise noted. Welding Standard: To AS/NZS 1554.1 use GP category welds unless otherwise noted. Visually examine the total length of all GP welds.
TIMBER & STEEL CONSTRUCTION AS 1604.1 or alternatively with BFCA salts by the CSIRO approved dip-diffusion process. The minimum dry salt retention in permeable species is 5.6 kg/m3 to all timber with susceptible sapwood. Timber grades Hardwood: To AS 2796.1 Grading: To AS 2796.2 Structural Timbers: Generally F14 minimum. Timber Trusses: To the truss manufacturers design. Fasteners Use fasteners capable of transmitting the loads imposed, and sufficient to ensure the rigidity of the assembly.
BLOCK CONSTRUCTION Fixing: Fix to the top plate with 50 x 5 mm mild steel over brackets with 1-M12 bolt to the truss top chord centre line and 1-M16 bolt to the structure. 4.8 MISCELLANEOUS ITEMS Roof Battens: Generally 75 x 50 mm Hardwood. Ceiling Battens: Generally 75 x 38 mm Hardwood. Fixing: Fix in long lengths with joints at truss crossings and staggered. Double nail ceiling battens and fix roof battens to Deemed to Comply details.
BLOCK CONSTRUCTION Maximum length of continuous wall: 6 m. Minimum width of control joint: 10 mm. Flexible ties and anchors If ties or anchors extend across control joints, provide ties or anchors which maintain the stability of the masonry without impairing the effectiveness of the joint. Proprietary Item: Masonry flexible anchors MFA3/3 install at 400 crs max.
INSULATION AND SARKING 6. INSULATION AND SARKING 6.1 GENERAL Interpretation Sarking-type material: Flexible membrane material normally used for waterproofing, vapour retarding or thermal reflective insulation. 6.2 MATERIALS AND COMPONENTS Bulk insulation Cellulosic fibre: To AS/NZS 4859.1 Section 5. Mineral blankets and cut pieces to AS/NZS 4859.1 Section 8. Glass fibre in loose fill: To AS/NZS 4859.1. Polystyrene: Moulded rigid cellular sheets: To AS1366.3.
ROOFING 7. ROOFING 7.1 GENERAL Cross reference Refer to the Insulation and Sarking section for roof sarking requirements. 7.2 MATERIALS AND COMPONENTS Roof material Formed from G550 steel (or G300 for curving) with an AZ 150 Finish complying with AS 1397. Protection: Protect the roof sheets from damage during handling and storage and prevent damage by moisture in stacked sheets. Prepainted Steel Prepainted steel sheet, factory finished with a polyester finish to AS/NZS 2728.
DOORS & WINDOWS Minimum slope of eaves gutters: 1:200. Eaves Gutters: High fronted square profile with overflow slots. Size 125 x 100 mm. Material: Prepainted Steel 0.55 mm BMT. Fixing: Fix to fascia with 40 mm x 1.0 mm galvanized brackets at 900 mm max. centres with overstraps. Expansion Joints: Form expansion joints at max. 12 m centres by stop ending the gutter and saddle flashing over the two stop ends. Valley Gutters: Profile to suit the valley boards. Turn back both edges 180o x 12 mm high.
DOORS & WINDOWS hardware, spreaders, mortar guards, switch boxes, fixing ties or brackets, and cavity flashing with suitable provision for fixing hardware; prefinished with protective coatings, built in or fixed to prepared openings. Sections Incorporate rebates or double rebates where required for side hung doors or glazed transoms. Coated steel sheet: To AS 1397. Frame material: 1.2 mm thick zincanneal (Lysaght GZ-ZF100).
CLADDING & LINING 8.9 ROLLER SHUTTERS Manual operation Use a proprietary system comprising a flexible curtain sliding between vertical guides incorporating windlocks and operating mechanism of a hand pulled chain or for smaller units a spring balanced inertia movement. Motorised operation Provide a proprietary operator with a limit switch, manual safety stop and reversing mechanism, and overload cutout operated by a battery-powered radio remote controller and by a direct push-button or key switch.
CLADDING & LINING Louvre Blade width: 150 mm nominal. Glass Louvre Blades: To AS 1288. Metal Louvre Blades: Proprietary pre finished metal blades complying with the design requirements. 8.14 INSTALLATION Install flashings and weatherings so that water is prevented from entering the building. Finish the installation with trims etc., to make neat, clean junctions at adjoining building surfaces. 8.15 COMPLETION Remove temporary protection and ensure smooth and free operation of the assemblies. 9.
SUSPENDED CEILINGS Visible accessories Provide materials with the same finish as cladding sheets. 9.7 LINING Materials and components Plasterboard Standard: To AS/NZS 2588. Do not use plasterboard in wet areas. Fibre cement Standard: To AS/NZS 2908.2, type B, category 2. Fasteners Steel nails: Use corrosion resistant nails. Self Drilling Screws: To AS 3566, corrosion resistance Class 2. 9.8 PLASTERBOARD Installation Plasterboard: To AS/NZS 2589. Framed construction: Screw or nail or combine with adhesive.
PLASTERING 10.4 CONSTRUCTION GENERALLY Ceiling grid – Hold Point Set out the ceiling grid so that panel joints and centrelines of visible suspension members coincide with grid lines if shown on the drawings. If not otherwise shown, set out so that opposite margins are equal. Hold Point: Obtain approval of the setout before commencing the installation. Support members: Galvanized metal rods with a length adjustment of 50mm.
JOINERY & FIXTURES Metal backgrounds Fix metal lath to provide a key for plaster. Press the plaster through the aperatures of the metal lathe. Dense concrete backgrounds Provide a mechanical key by hacking, bush hammering or abrasive blasting to expose the aggregate then dash coat. 11.4 PLASTERING Thickness limits One coat work: 12 - 15 mm. Multi-coat work: • First coat: 9 - 15 mm. • Setting coat: 2 - 3 mm.
JOINERY & FIXTURES Decorative laminated sheet application table Provide classes as follows in either standard type or type P for posting forming as applicable: Class to AS/NZS 2924.1 Application HGS or HGP Kitchenwork-tops VGS Kitchen front panels VLS Other locations Thickness When fixed to a continuous background • Horizontal surfaces: 1.2 mm • Vertical surfaces: 0.8 mm • Post formed laminate: 0.8 mm • Edge strips: 0.4 mm • Vertical fixing to studs etc: 3.0 mm 12.
TILING signs in accordance with the general requirements of AS/NZS 1841.1. Fire blankets Provide fire blankets and location signs to AS/NZS 3504 - size: 1800 x 1800 mm. 12.8 DISPLAY BOARDS White boards White Viterous enamel steel sheet on 13 mm plasterboard with aluminium foil backing fixed in a clear anodised aluminium frame with a black neoprene strip to conceal fixings and an integral pen rail. Conceal screw fix to wall at 900 maximum crs. Pin boards Homogenous, resilient, hessian backed cork 3.
TILING Absorbent substrates: If suction is excessive, control it by dampening but avoid over-wetting and do not apply mortar bedding to substrates showing surface moisture. Dense concrete: If not sufficiently rough to provide a mechanical key, roughen by scabbling or the like to remove 3 mm of the surface and expose the aggregrate; then apply a bonding treatment. 13.
PAINTING 14. PAINTING 14.1 GENERAL Standards Follow the guidance given in AS/NZS 2311 and AS/NZS 2312. Powder Coating Aluminium surfaces: To AS 3715. Steel or zinc coated surfaces: To AS 4506. ‘Wet Paint’ warning Place notices conspicuously and do not remove them until the paint is dry. 14.2 MATERIALS AND COMPONENTS Premium Paints Use only premium paints from approved manufacturers.
FLOOR COVERINGS 15. FLOOR COVERINGS 15.1 GENERAL Cross reference Refer to the Painting section for finishing of sanded timber floors. Approved Fixers Have the floor coverings and accessories installed by experienced fixers approved by the floor covering supplier. 15.2 INSPECTION Notice - Witness Point Witness Point: Give sufficient notice so that inspection may be made of the prepared substrate or underlay. 15.3 MATERIALS AND COMPONENTS Hardboard underlay Standard: To AS/NZS 1859.
PLUMBING & DRAINAGE edges and align patterns. Arrange the material so that variation in appearance is minimised. Adhesives Use adhesives as recommended by the manufacturer for the particular application. Joints Heat welding: After fixing, groove the seams with a grooving tool and weld the joints with matching filler rod and hot air welding gun. When the weld rod has cooled, trim off flush. Cold welding: Apply seaming compound 100 mm wide to the substrate centrally under the seam.
PLUMBING & DRAINAGE Corrosive water areas: Use class 16 Polybutylene pipes to AS/NZS 2642.2 and where exposed, use 316 stainless steel pipes. Finishes Finish exposed piping, including fittings and supports as follows: • Internal locations such as toilet and kitchen areas: Bright chrome plate. • Externally: Paint. • Concealed but accessible spaces (including cupboards and non-habitable enclosed spaces): Leave unpainted except for required identification marking. Prime steel piping and iron fittings.
PLUMBING & DRAINAGE 16.9 WASTEWATER General Standard To AS/NZS 3500.2 or AS/NZS 3500.5. Materials: UPVC drainage pipes, type DWV. Waterless composting toilets: To AS/NZS 1546.2 On site domestic wastewater treatment units: To AS/NZS 1546.3. Cleaning During construction, use temporary covers to openings and keep the system free of debris. On completion, flush the system using water and leave it clean. Septic tanks Precast concrete or glass fibre reinforced plastic septic tank: To AS/NZS 1546.1.
ELECTRICAL INSTALLATIONS Appliances Gas water heaters: To AS 4552. Gas space heating appliances: To AS 4553. Commissioning On completion of installation and testing, turn on isolating and control valves and purge and charge the installation. Compliance plate - Hold Point Hold Point: Install a compliance plate and provide a certificate of approval prior to practical completion. 17. ELECTRICAL INSTALLATIONS 17.1 GENERAL Cross reference Refer to the Site preparation section for service trenches.
MECHANICAL INSTALLATIONS Smoke detection Provide smoke detectors to the requirements of the BCA. Standard: To AS 3786. Power: Connect to the nearest light circuit or where the number of detectors is 4 or more connect to a dedicated final subcircuit. Connection: Inter connect detectors so as to raise the alarm in all areas in the event of one detector being activated. Installation: To AS 1670.6. Emergency lighting Provide emergency lighting and exit signs in accordance with the BCA and to AS 2293.1.
FENCES Dryness testing: Test each refrigerant system for dryness by evacuating the whole system when the ambient temperature is over 16oc to maximum 25 Pa absolute pressure and measuring the pressure rise with the vacuum pump isolated from the system. Maximum allowable absolute pressure rise after minimum 4 hours is 15 Pa. 18.3 INSTALLATION GENERALLY Installation: Bolt units down to manufacturer’s recommendations using anti vibration mounts. Install refrigeration piping and electrical wiring neatly.
FENCES Wire Chainwire, cablewire, tiewire or barbed wire: To AS 2423. Concrete Standard: To AS 1379 Grade N25. Metal Components Self-drilling screws: To AS 3566 corrosion resistant class 3. Steel framing: Zinc-coated or aluminium/zinc alloy coated steel to AS 1397/Z450 or AZ150. Steel sheeting: Prepainted to AS/NZS 2728. 19.3 CONSTRUCTION GENERALLY Clearing Clear vegetation except for trees and shrubs to be retained within 1 m of the fence alignment.
PAVING 20. PAVING 20.1 GENERAL Cross reference Refer to the Site Preparation section for fill types. Footpath crossing Provide a footpath and kerb crossing to local council requirements. 20.2 MATERIALS AND COMPONENTS Mortar materials Sand: Use a fine aggregate with a low clay content selected for grading. Cement: To AS 3972, type GP. Mortar Mix proportions: 1:3 cement: sand. 20.
LANDSCAPE 20.8 IN SITU CONCRETE PAVING Concrete Standard: To AS 1379 grade N25. Minimum thickness Foot and bicycle traffic and light domestic traffic occasionally up to 3 tonne gross: 100 mm. Reinforcing Mesh: SL62 placed centrally. Use pine timber, pressure impregnated with ACQ preservative formulation, copper oxide (CuO) and quaternary ammonium compound (DDAC) to Category H4 of AS 1604. Do not use preservative treatments that contain arsenic or chromium.
LANDSCAPE 21. LANDSCAPE 21.1 GENERAL Cross reference Refer to the General requirements section for timber durability. 21.2 MATERIALS AND COMPONENTS Concrete Standard: To AS 1379. Topsoil Standard: To AS 4419. 21.3 PREPARATION Weed eradication Eradicate weeds using a non-residual glyphosate herbicide in any registered formulae, at the recommended maximum rate. Surplus spoil Remove surplus spoil from site. Do not burn vegetative material. 21.
LANDSCAPE • To finish flush, after tamping, with adjacent finished surfaces of ground, paving edging, or grass seeded areas. Tamping Lightly tamp to an even surface immediately after laying. Do not use a roller. Watering Water immediately after laying until the topsoil is moistened to its full depth. 21.9 GRASS SEEDING Seed Use seed mixtures which are thoroughly pre-mixed with a bulking material such as safflower meal. Deliver to the site in bags marked to show weight, seed species and supplier’s name.
LANDSCAPE Initial fertiliser at planting or sowing Location N:P:K Application Ratio Rate Grassed 15.9-7-7 7.5 kg/ areas Product Mastergreen 100m2 All 20-10-10 Manufact. Monsoon planted and trace Recomm. Planting trees: elements Tablets equally spaced around root ball All 12.5-3.3- Manufact. Monsoon planted 6.5 Recomm. Planting and trees: Feeding Mix under mulch Ground 13-5.
LANDSCAPE Requirement: Form a spade cut edge to a minimum depth of 150 mm below the adjacent surface levels. Align adjacent spade cuts to achieve smooth curves and/or straight lines as required. Remove all grass or weeds from the spade cut and maintain the edge free from grass and weed growth. Concrete Edging Location: To garden edges against lawns and areas not planted. Edging Strip: N20 in situ concrete 175 mm wide x 90 mm high.
LANDSCAPE Drippers: Use drippers which are turbulent flow types, easily dismantled for cleaning. Connect directly into the pipework or with microtubes. Micro irrigation valve box: Use micro irrigation valve boxes which are of high impact plastic with snap lock covers at finished ground level, each housing a stop cock, filter (200 mm for microsprays, 100 mm for drippers), pressure reducing valve (170 kPa outlet pressure) and automatic control valve. Use vandal resistant controls in public areas.
REFERENCED DOCUMENTS REFERENCED DOCUMENTS AS 1074 1989 AS 1111.1 2000 AS 1163 1991 AS/NZS 1170.0 2002 AS/NZS 1170.2 2002 AS 1214 1983 AS/NZS 1221 1997 AS 1231 2000 AS 1288 2006 AS 1289.5.4.1 2007 AS 1289.5.1.1 2003 AS 1324.1 2001 AS/NZS 1328.1 1998 AS 1366 AS 1366.3 1992 AS 1366.4 1989 AS/NZS 1367 2007 AS 1379 2007 AS 1397 2001 AS 1417 AS 1417.1 1987 AS 1417.2 1991 AS 1428.1 2001 AS 1432 2004 AS/NZS 1477 2006 AS/NZS 1546.1 2008 AS/NZS 1546.2 2008 AS/NZS 1546.
REFERENCED DOCUMENTS AS 1672.1 1997 AS/NZS 1677.2 1998 AS 1684.1 1999 AS 1684.2 2006 AS 1684.3 2006 AS 1691 1985 AS 1720.1 1997 AS 1789 2003 AS/NZS 1841.1 2007 AS/NZS 1859 AS/NZS 1859.1 2004 AS/NZS 1859.2 2004 AS/NZS 1859.3 2005 AS/NZS 1859.4 2004 AS/NZS 1866 1997 AS/NZS 1873.4 2003 AS 2032 2006 AS 2047 1999 AS 2150 2005 AS 2159 1995 AS/NZS 2201.1 2007 AS/NZS 2208 1996 AS/NZS 2269.0 2008 AS/NZS 2270 2006 AS/NZS 2271 2004 AS 2293.
REFERENCED DOCUMENTS AS 3006 1982 AS/NZS 3008.1.1 1998 AS 3439.1 2002 AS 3439.3 2002 AS/NZS 3500 AS/NZS 3500.1 2003 AS/NZS 3500.2 2003 AS/NZS 3500.3 2003 AS/NZS 3500.4 2003 AS/NZS 3500.5 2000 AS/NZS 3504 2006 AS 3566 AS 3566.1 2002 AS 3566.2 2002 AS 3600 2001 AS 3610 1995 AS 3623 1993 AS 3660.1 2000 AS/NZS 3666.1 2002 AS/NZS 3678 1996 AS/NZS 3679.1 1996 AS 3700 2001 AS 3715 2002 AS 3740 2004 AS 3786 1993 AS/NZS 3823 AS/NZS 3823.1.1 1998 AS/NZS 3823.1.
REFERENCED DOCUMENTS AS/NZS 4455.3 2008 AS 4506 2005 AS 4552 2005 AS 4553 2000 AS/NZS 4600 2005 AS/NZS 4671 2001 AS/NZS 4680 2006 AS/NZS 4692.1 2005 AS/NZS 4692.2 2005 AS 4750 2003 AS/NZS 4782.2 2004 AS/NZS 4783.2 2002 AS/NZS 4792 2006 AS/NZS 4858 2004 AS/NZS 4859.1 2002 AS 5039 2008 AS 5040 2003 AS 5601 2004 AS 5604 2005 AS 6002 1999 AS 6669 2007 AS/NZS 60598.1 2003 AS 60947.1 2004 AS 60947.2 2005 SAA MP52 2005 AS/ACIF S008 2006 AS/ACIF S009 2006 SAA HB 40.
REFERENCED DOCUMENTS 0163/1 0163/2 0171 0172 0181 0200/1 0200/2 0205 0206 0208 0260/1 0260/2 0260/3 0260/4 0260/5 0280/1 0280/2 0280/3 0280/4 0280/5 2908 2916 2971 2972 Exterior latex undercoat (buildings) Interior latex undercoat (buildings) Solvent borne sealer for concrete and masonry (buildings) Latex sealer for wallboards (buildings) Solvent borne wood primer (buildings) One pack semi gloss pigmented solvent borne paving paint for concrete One pack full gloss pigmented solvent borne paving paint for
