S02 - SECTION 12 36 00 Countertops.pdf

Replace Case Work in Dental 640-20-117

Palo Alto, Building 100, VA Palo Alto Health Care System Final Bid Document

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SECTION 12 36 00

COUNTERTOPS

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies casework countertops with integral accessories.

B. Integral accessories include:

1. Sinks with traps and drains.

2. Eye and Face Wash Units.

3. Mechanical Service fixtures.

4. Electrical Receptacles.

1.2 RELATED WORK

A. Color and patterns of plastic laminate: SECTION 09 06 00, SCHEDULE FOR

FINISHES.

1.3 SUBMITTALS

A. Submit in accordance with SECTION 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

B. Shop Drawings

1. Show dimensions of section and method of assembly.

2. Show details of construction at a scale of ½ inch to a foot.

C. Samples:

1. 150 mm (6 inch) square samples each top.

2. Front edge, back splash, end splash and core with surface material and booking.

1.4 APPLICABLE PUBLICATIONS

A. Publications listed below form a part of this specification to the extent referenced. Publications are referenced in the text by the basic designation only.

B. American Hardboard Association (AHA):

A135.4-95...............Basic Hardboard

C. Composite Panel Association (CPA):

A208.1-09...............Particleboard

D. American Society of Mechanical Engineers (ASME):

A112.18.1-12............Plumbing Supply Fittings

A112.1.2-12.............Air Gaps in Plumbing System

A112.19.3-08(R2004).....Stainless Steel Plumbing Fixtures (Designed for

Residential Use)

E. American Society for Testing and Materials (ASTM):

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A167-99 (R2009).........Stainless and Heat-Resisting Chromium-Nickel

Steel Plate, Sheet and Strip

A1008-10................Steel, Sheet, Cold-Rolled, Carbon, Structural, High Strength, Low Alloy

D256-10.................Pendulum Impact Resistance of Plastic

D570-98(R2005)..........Water Absorption of Plastics

D638-10.................Tensile Properties of Plastics

D785-08.................Rockwell Hardness of Plastics and Electrical

Insulating Materials

D790-10.................Flexural Properties of Unreinforced and

Reinforced Plastics and Electrical Insulating

Materials

D4690-99(2005)..........Urea-Formaldehyde Resin Adhesives

F. Federal Specifications (FS):

A-A-1936................Adhesive, Contact, Neoprene Rubber

G. U.S. Department of Commerce, Product Standards (PS):

PS 1-95.................Construction and Industrial Plywood

H. National Electrical Manufacturers Association (NEMA):

LD 3-05.................High Pressure Decorative Laminates

PART 2 - PRODUCTS

2.1 MATERIALS

A. Solid Acrylic Polymer or Alumina Trihydrate Material:

1. Cast into sheet form and bowl form.

2. Color throughout with subtle veining through thickness.

3. Chemically joined welds.

2.2 SINKS

Not Used

2.3 TRAPS AND FITTINGS

Not Used

2.4 WATER FAUCETS

A. ASME A112.18.1.

1. Cast or forged brass, compression type with replaceable seat and stem assembly or replaceable cartridge.

2. Lever handles either with or without head.

4. Swing spouts elevated to clear handles.

5. Exposed brass surfaces chromium plated.

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2.5 FUEL GAS, LABORATORY AIR AND LABORATORY VACUUM FIXTURES

Not Used.

2.6 FIXTURE IDENTIFICATION

Not Used.

2.7 ELECTRICAL RECEPTACLES

Not Used

2.8 ELECTRIC DROP-IN HOTPLATE (RANGE) UNITS

Not Used

2.9 FILM VIEWER

Not Used

2.10 COUNTERTOPS

A. Fabricate in largest sections practicable.

B. Fabricate with joints flush on top surface.

C. Fabricate countertops to overhang front of cabinets and end of assemblies 25 mm (one inch) except where against walls or cabinets.

D. Provide 1 mm (0.039 inch) thick metal plate connectors or fastening devices (except epoxy resin tops).

E. Join edges in a chemical resistant waterproof cement or epoxy cement, except weld metal tops.

F. Fabricate with end splashes where against walls or cabinets.

G. Splash Backs and End Splashes:

1. Not less than 19 mm (3/4 inch) thick.

2. Height 100 mm (4 inches) unless noted otherwise.

3. Laboratories and pharmacy heights or where fixtures or outlets occur: Not less than 150 mm (6 inches) unless noted otherwise.

H. Drill or cutout for sinks, and penetrations.

1. Accurately cut for size of penetration.

2. Cutout for VL 81 photographic enlarger cabinet.

a. Finish cutout to fit flush with vertical side of cabinet, allowing adjustable shelf to fit into cutout space of cabinet at counter top level. Finish cutout surface as an exposed edge.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Before installing countertops verify that wall surfaces have been finished as specified and that mechanical and electrical service locations are as required.

B. Secure countertops to supporting rails of cabinets with metal fastening devices, or screws through pierced slots in rails.

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1. Where type, size or spacing of fastenings is not shown or specified, submit shop drawings showing proposed fastenings and method of installation.

2. Use round head bolts or screws.

3. Use epoxy or silicone to fasten the epoxy resin countertops to the cabinets.

4. Use wood or sheet metal screws for wood or plastic laminate tops;

minimum penetration into top 16 mm (5/8 inch), screw size No 8, or

10.

C. Rubber Moldings:

1. Where shown install molding with butt joints in horizontal runs and mitered joints at corners where ceramic tile occurs omit molding.

2. Fasten molding to wall and to splashbacks and splashends with adhesive.

D. Sinks

1. Install stainless steel sink in plastic laminate tops with epoxy compound to form watertight seal under shelf rim.

a. In laboratory and pharmacy fit stainless steel sink with overflow standpipe.

b. Install faucets and fittings on sink ledges with watertight seals where shown.

2. Install molded resin sinks with epoxy compound to form watertight seal with underside of molded resin top.

a. Install sink with not less than two channel supports with threaded rods and nuts at each end, expansion bolted to molded resin top.

b. Design support for a twice the full sink weight.

c. Install with overflow standpipes.

3. Install methyl methacrylic polymer sinks in manufacturers recommended adhesive sealer or epoxy compound to underside of methyl methacrylic polymer countertop.

a. Bolt or screw to countertop to prevent separation of bowl and fracture of adhesive sealant joint.

b. Install drain and traps to sink.

E. Faucets, Fixtures, and Outlets:

1. Seal opening between fixture and top.

2. Secure to top with manufacturers standard fittings.

F. Range Tops, Electrical Outlets, Film Viewer:

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1. Set in cutouts with manufacturers gasket sealing joint with top to prevent water leakage.

2. Install control unit and electric outlets where shown. Seal escutcheon plate at lap if on counter or top to prevent water leakage.

3.2 PROTECTION AND CLEANING

A. Tightly cover and protect against dirt, water, and chemical or mechanical injury.

B. Clean at completion of work.

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