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Materials
A.

Carcase Type A: MDF with polyurethane finish.

Carcase Type B: Structural grade pre-finished board equal to Laminex Industries. Fix 2mm rigid PVC edge strips to all edges including drawers. Carcase Construction: Form up cupboard sides, ends, bottoms, divisions, tops, shelves, bases, doors and drawer fronts in 18mm, moisture resist medium density fibre board (MDF), with 9mm (for under-bench units) and 16mm (for wall fixed units) medium density fibre board backs. Drawers to have 16mm sides and backs, 9mm bottoms

B.

Bench Substrate:

Laminated tops: 33mm high moisture resistant (HMR) particle board. Chemform tops: 22mm flooring grade particle board equivalent to black tongue 'aquabar' from Laminex Industries, underside sealed.

Balance Benches: 60mm reinforced concrete underside sealed.

C.

Steel Frame and Legs:

Fabricate bench, services spine and fume cupboard support frame out of 38x38x1.6mm ERW (Electric Resistant Welded) semi-bright tube, welded to conform with the applicable Australian Standard. Provide adjustable leveling feet with black nylon sole and zinc plated 3/8 BSW thread.

Balance bench frames shall be in 50mm SHS 4mm wall thickness.

Adjustable height bench frames shall be 'Space Lab' type or approved, equal with a static load capacity of 500 kg.

D.

Polymeric sheet:

13mm thick cross-linked filled polymeric material homogeneous, non-coated, non-laminated equal to 'Chemform'. Colour to be selected from standard range, installation only by manufacturer's approved fabricator.
E.

 
F.

Laminated Plastic Sheet:

To AS 2924 and AS 2925. Laminated Plastic Sheet shall be 1.0mm high pressure, chemical resistant grade postformed to achieve a bench top with bull nose edge and integral splashback. Colour to be selected from manufacturer's standard range.
G.

Polypropylene sinks, troughs and drip-cups for under polymeric bench tops to be selected from the standard range of approved polypropylene products.
H.

Stainless Steel Sinks, Drainboards and Benches and Integral Splashback:

To be fabricated from 1.2mm Grade 316 stainless steel No 4 finish. Sinks can be self-trimming and therefore suitable for laminate plastic sheet benchtops.

I.

Fastenings:

  1. Provide necessary fixings, fastenings, anchors, lugs, nails, screws, bolts, straps and the like of approved types, sufficient to transmit the loads and stresses imposed and ensure the rigidity of the assembly. Drill timbers for fastenings to prevent splitting. Stapling is not permitted. Explosive driven fastenings are not permitted
  2. Wood screws to be particleboard or twinfast screws of lengths and gauges recommended by the medium density fibre board manufacturer. Drill pilot holes for all screws.
  3. Masonry anchors to be an approved patent expansion type.
  4. Mechanical joints to be approved patent mechanical fastener.
  5. Plugs in masonry to be dry winding softwood, or plastic plugs of an approved type
J.

Adhesives:

Use adhesives of approved types sufficient to transmit the loads and stresses imposed and ensure the rigidity of the assembly. Prevent adhesives from staining surfaces specified to have clear or transparent finishes

K.

Hardware:

Generally, all hinges, adjustable shelf support, castors, drawer runners, sliding door tracks, floor glides, and any other hardware necessary to complete the joinery shall be first quality and suitable for their intended use and clearly shown on the Shop Drawings and incorporated in prototypes for approval.

  1. Hinges: One pair per door leaf suitable for bi-folding doors to be all metal 170° concealed hinges.
  2. Handles: One per door, 300mm long D handle of solid nylon.
  3. Mount handles as shown on the Drawings.
  4. Bi-fold door control arm: One per 2 Leaf door, nylon and coated steel.
  5. Adjustable shelves supported on brass shelf supports with brass sleeves, spaced at 64mm centres.
  6. Drawer runners: White epoxy coated steel sections with nylon rollers.
  7. Movable furniture glides: Plastic Studs, 4 per unit.
  8. Balance bench bearings: Pure rubber elastomeric bearings 10mm thick x 30mm square, four per balance bench top. The 30mm may vary with the plan dimension of the bench top so that the rubber bearing walls 'bulge'.

Fabrication (Shop Fabrication)
1.

Provide fixtures and furniture as shown on the Drawings, made up from components as specified.

Construct by trenching, clamped and glued.

A dry-stapled butt jointed or knock-down assembly will not be approved.

Fabricate bench tops as indicated in a manner recommended by the material's manufacturer. Fabricate units without joins unless counter length exceeds maximum available length of materials.

Bench frames shall be manufactured in a square and lateral plane and be true to size as specified on drawings.

Install polypropelene sinks, as recommended by the manufacturer.

Cut out for electrical service outlets and hydraulic service pipes and stop cocks under benches.

Cut out for bench water units. Locate openings accurately using templates or roughing-in diagrams for proper size and shape. Smooth edges of cut-outs and where located in bench tops and similar exposures, seal edges of cut-outs with a water resistant coating.

Provide blockout sections where shown on the drawings for ductwork which extends to bench level, conceal ducts by boxing in.

Conceal fastenings where possible, sink the heads below the surface and fill flush by an approved means to match the finished surface.

Scribe internal and mitre external joint. Scribe fixtures wherever possible to fit against abutting finished surfaces.

2.

Fit all hardware after necessary trenching and polyurethane coating.

3.

Facings:

Refer laboratory plan for locations.

Polymeric sheet:

Fix to continuous flooring grade particle board substrate on site with adhesive applied in accodance with the manufacturer's materials and recommendations.

Location:

To benchtop, integral splashback with internal corner radiused 5mm, square cut sides and front edge radiused 2mm.

High density fibre board:

Fix in accordance with manufacturers instructions. Location: to benchtop, square cut or bull nose front edge, square cut ends.

Laminated Plastic Sheet:

Fix to continuous HMR particleboard substrate with spray applied contact cement containing heat resistant additive to AS 21 31, in accordance with the manufacturer's recommendations. For small areas (eg edges) hand applied adhesive as above may be used.

Location:

To benchtop, integral splashback, square cut sides and bull nose post formed front edge.

4.

Stainless Steel Benchtops:

The stainless steel is to have 18mm 'A' bond water proof plywood adhesive fixed to underside and sealed and coated with polyurethane sealant. Exposed sides to be square cut and faced with stainless steel returned to underside of bench top min. 50mm.

Internal corners to be radiused.

Joints:

Fit carefully and weld using electrodes of correct type and matching colour. Anneal after welding where necessary. Grind off flush with adjacent surfaces, or to a neat rounded shape at angled junctions, in surfaces which will be visible in the completed installation. Finish to match the surface of the unit.

Finishes

Types of Finishes

A.

Polymeric sheet integral, colour selection from standard range.

B.

Laminated Plastic Sheet integral, colour selection from standard range.
C.

Polyurethane Finish:

After furniture fabrication and before fitting hardware apply finish to all surfaces to achieve a continuous seal.

Application:

Two pack coloured polyurethane — by spraying in a fully enclosed spray booth.

  1. Fill all holes, cracks and joints with putty
  2. Apply undercoats and finishing coats to approved manufacturer's recommendation. Standard colour Dove Grey
D.

Epoxy Finish:

Apply to High density fibre board.

Application:

Two pack equal to Vepox CC21 - by spraying in a fully enclosed down-draught booth.

  1. Fill all holes, cracks and joints with putty
  2. Apply undercoats and finishing coats to approved manufacturer's recommendation
E.

Metal Finish:

Protection Coating of Steelwork:

Apply to all external surfaces of fabricated steel work, unless specified otherwise.

All protective coatings shall be shop applied in a covered area properly protected against adverse weather conditions and contamination by wind borne dust and debris or other fabrication and finishing processes.

All frames shall be mechanically and chemically clean and coated in TGIC polyester resin based powder and cured for twenty minutes at 191°C. Colour to be APO Grey.

Fitment items:

All steelwork frames and legs, brackets, etc excluding stainless steel.

F.

Stainless Steel Benchtops:

No 4 finish suitable for laboratory surfaces.

Fitment items:

Benches as shown on the Drawings.

Installation of Fitments

Use concealed shims as required to fixed units to install the work plumb, level, straight and distortion free.

Scribe and cut to fit adjoining work; refinish cut surfaces or repair damaged finishes at cuts.

Secure joinery with anchors or blocking built-in or directly attached to substrates. Secure to grounds, stripping and blocking with countersunk, concealed fasteners and blind nailing as required to complete the installation.

Install casework without distortion so that doors will fit openings properly and be accurately aligned.

Adjustments, Cleaning, Finishing and Protection

A.

Finish the work specified in the Section and remedy anything not finished at the shop or; other stage prior to completion.

B.

Adjust joinery to achieve a uniform appearance.

C.

Lubricate and clean hardware making any final adjustments needed for proper operation. Remove all handling marks from visible joinery surfaces.

D.

Protection:

Do everything needed to ensure that all work is without damage or deterioration at Practical Completion.

E.

Supply complete Maintenance Manual including manufacturer's recommendations for the maintenance of benchtop and other surface finishes. Include product brochures, contact names, telephone and fax numbers for re-order and replacement parts.