123200 Manufactured Wood Casework.pdf

Charles George VA Medical Center VA Project No. 637-315 Asheville, North Carolina Expand/Renovate Operating Rooms Bid Documents: 03/22/19

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SECTION 12 31 00

MANUFACTURED METAL CASEWORK

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies stainless steel casework and related accessories, including base cabinets, wall cabinets, and full height cabinets.

1.2 RELATED WORK

A. Color of casework finish: Section 09 06 00, SCHEDULE FOR FINISHES.

B. Electrical Components: Division 26, ELECTRICAL.

1.3 QUALITY ASSURANCE

A. Approval by Contracting Officer of proposed manufacturer, or suppliers, will be based upon submission by Contractor certification that, manufacturer regularly and presently manufactures casework specified as one of their principal products.

B. Installer has technical qualifications, experience, trained personnel, and facilities to install specified items.

C. Furnish supervision of installation at construction site by a qualified technician regularly employed by casework installer.

1.4 SUBMITTALS

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

DATA, AND SAMPLES.

B. Certificates:

1. Manufacturer's Certificate of qualifications specified and finish on casework.

2. Contractor's Certificate of installer’s qualifications specified.

3. Safety glass meets requirements of ANSI Standard Z97.1.

C. Manufacturer's Literature and Data:

1. Brochures showing name and address of manufacturer, and catalog or model number of each item incorporated into the work.

2. Manufacturer's illustration and detailed description.

3. List of deviations from contract specifications.

4. Locks, each kind

D. Shop Drawings (1/2 Full Scale):

1. Showing details of casework construction, including kinds of materials and finish, hardware, accessories and relation to finish of adjacent construction, including specially fabricated items or components.

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2. Fastenings and method of installation.

1.5 APPLICABLE PUBLICATIONS

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

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

A36/A36M-08.............Carbon Structural Steel

A167-99(R 2009).........Stainless and Heat-Resisting Chromium Steel

Plate Sheet and Strip

A283/A283M-03(R 2007)...Low and Intermediate Tensile Strength Carbon

Steel Plates

A568/A568M-09...........Steel, Sheet, Carbon and High-Strength, Low-

Alloy Hot-Rolled and Cold-Rolled, General

Requirements

A794/A794M-09...........Standard Specification for Commercial Steel

(CS), Sheet, Carbon (0.16% Maximum to 0.25%

Maximum) Cold Rolled

B456-03(R2009)..........Electrodeposited Coatings of Copper Plus Nickel

Plus Chromium and Nickel Plus Chromium

C1036-06................Flat Glass

C. American National Standard Institute:

Z97.1-09................Safety Glazing Material used In Buildings

D. Builders Hardware Manufacturers Association (BHMA):

A156.1-06...............Butts and Hinges

A156.9-10...............Cabinet Hardware

A156.5-10...............Auxiliary Locks and Associated Products

A156.11-10..............Cabinet Locks

A156.16-02..............Auxiliary Hardware

E. American Welding Society (AWS):

D1.1-10.................Structural Welding Code Steel

D1.3-08.................Structural Welding Code Sheet Steel

F. National Association of Architectural Metal Manufacturers (NAAMM):

AMP 500-505-06 Series...Metal Finishes Manual

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

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

H. Federal Specifications (Fed. Spec.):

FF-N-836D...............Nut, Square, Hexagon Cap, Slotted, Castle

Knurled, Welding and Single Ball Seat

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A-A-55615...............Shield, Expansion; Nail Expansion (Wood Screw and Lag Bolt Self-Threading Anchors)

PART 2 - PRODUCTS

2.1 MATERIALS

A. Sheet Steel:

1. ASTM A794, cold rolled, Class 1 finish, stretcher leveled.

2. Other types of cold rolled steel meeting requirements of ASTM A568 may be used for concealed parts.

B. Stainless Steel: ASTM A167, Type 302B.

C. Glass:

1. ASTM C1036 Type I, Class 1, Quality q3,

2. For Doors: 6 mm (1/4 inch) thick; except where laminated glass is shown.

D. Glazing Cushions:

1. Channel shaped, of rubber, vinyl or polyethylene plastic, with vertical flanges not less than 2 mm (3/32 inch) thick and horizontal web 3 mm (1/8 inch) thick.

2. Flanges may have bulbous terminals above the glazing heads or terminate flush with top of beads.

E. Fasteners:

1. Exposed to view, stainless steel.

2. Use round head or countersunk fasteners where exposed in cabinets.

3. Expansion Bolts: Fed Spec. A-A-55615. Do not use lead or plastic shields.

4. Nuts: Fed Spec FF-N-836. Type III, Style 15 where exposed.

5. Sex Bolts: Capable of supporting twice the load.

2.2 MANUFACTURED PRODUCTS

A. When two or more units are required, use products of one manufacturer.

B. Manufacturer of equipment assemblies, which include components made by other, shall assume complete responsibility for the final assembled unit.

C. Constituent parts which are alike, use products of a single manufacturer.

2.3 CASEWORK FABRICATION

A. General:

1. Welding: Comply with AWS Standards.

2. Reinforce with angles, channels, and gussets to support intended loads, notch tightly, fit and weld joints.

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3. Constructed of sheet steel, except where reinforcing required.

B. Minimum Steel Thickness:

0.89 mm (0.035 inch) (20 gage)

Drawer fronts, backs, bodies, closure plates or scribe and filler strips less than 75 mm (three inches) wide, sloping top, shelf reinforcement channel and shelves. Toe space or casework soffits and ceilings under sloping tops.

1.20 mm (0.047 inch) (18 gage)

Base pedestals, casework top sides, back, and bottom panels, closure scribe and filler strips 75 mm (three inches) or more. Reinforcement for drawers with locks. Tables legs, spreaders and stretchers, when fabricated of cold rolled tubing. Metal for desks; except legs and aprons. Door exterior and interior panels, flush or glazed. Cross rails of base units. Front bottom rails, back bottom rails;

rails may be 1.49 mm (0.059 inch) (16 gage) thick.

Uprights or posts. Top corner gussets.

1.49 mm (0.059 inch) (16 gage)

Aprons, apron division, reinforcing gussets, table legs, desk legs and aprons, spreaders and stretchers when formed without welding. Toe base gussets, drawer slides, and other metal work. Front top rails and back rails except top back rails may be 1.2 mm (0.047 inch) (18 gage) thick.

1.88 mm (0.074 inch) (14 gage)

Drawer runners door tracks.

2.64 mm (0.104 inch) (12 gage)

Base unit bottom corner gussets and leg sockets.

3 mm (0.12 inch) (11 gage)

Reinforcement for hinge reinforcement inside doors and cabinets.

C. Casework Construction:

1. Welded assembly.

2. Fabricate with enclosed uprights or posts full height or width at front, include sides, backs, bottoms, soffits, ceilings under sloping tops, headers and rail, assembled to form an integral unit.

3. Form sides to make rabbeted stile 19 to 28 mm (3/4 to 1-1/8 inch) wide, closed by channel containing shelf adjustment slots.

4. Make bottom of walls units flush, double panel construction.

5. Make top and cross rails of "U" shaped channel.

6. Provide enclosed backs and bottoms in cabinets, including drawer units.

7. Provide finish panel on exposed cabinet backs.

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8. Do not use screws and bolts in construction or assembly of casework, except to secure hardware, applied door stops, accessories, removable panels and where casework is required to fastened end to end or back to back.

9. Fabricate casework with finished end panels.

0. In base units with doors provide removable backs.

11. Provide reinforcing for hardware.

12. Size Dimensions:

a. Used dimensions shown or specified within tolerances specified.

b. Tolerance:

1) Depth: 325 mm (13 inches) in lieu of 300 mm (12 inches), 450 mm (18 inches) in lieu of 400 mm (16 inches), except wall hung units above counter. 525 mm (21 inches) to 600 mm (24 inches) in lieu of 550 mm (22 inches).

2) Width: Minus 25 mm (one inch).

3) Height: 25 mm (one inch) plus or minus for wall hung cabinets and counter mounted cabinets, excluding sloping tops. 25 mm

(one inch) plus for floor standing cabinets, excluding base and sloping tops. Full height cabinets shown back to back same height.

4) Manufacturer's tolerance for the same length, depth or height:

Not to exceed 1.58 mm (0.0625 inches).

D. Base Pedestals:

1. Provide adjustable leveling bolts accessible through stainless steel plugs, or notch in the base concealed when resilient base is applied.

2. Except where flush metal base is shown, provide toe space at front recessed 75 mm (3 inches).

E. Doors:

1. Fabricate glazed metal doors with reinforced frame and construct either from one piece of steel, or have separate stiles and rails mitered and welded at corners, and welds ground smooth.

a. Secure removable glazing members with screws to back of doors.

b. Install glass in rubber or plastic glazing channels.

2. Provide sheet steel hinge reinforcement inside doors.

3. Doors removable without use of tools except where equipped with locks.

F. Drawers:

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1. Drawer fronts solid metal type not less than 16 mm (5/8 inch) thick with sound deadening core. Fabricate of two panels formed into pans.

Weld and grind smooth corners of drawer fronts.

2. Form bodies from one piece of steel, weld to drawer front.

3. Provide reinforcement for locks and provide rubber bumpers at both sides of drawer head to cushion closing.

4. Equip with 150 pound full extension stainless steel drawer slides.

G. Sloping Tops:

1. Provide sloping tops for casework where shown.

2. Where ceilings interfere with installation of sloping tops. Provide filler plates as specified.

3. Provide exposed ends of sloping tops with flush closures.

4. Fasten sloping tops with sheet metal screws inserted from cabinet interior; space fastener as recommended by manufacturer.

H. Shelves:

1. Capable of supporting an evenly distributed minimum load of 122 kg/m2 (twenty-five pounds per square foot) without visible distortion.

2. Flange shelves down 19 mm (3/4 inch) on edges, with front and bearing edges flanged back 13 mm (1/2 inch).

3. For shelves over 1050 mm (42 inches) in length and over 300 mm (12 inches) in depth install 38 mm by 13 mm by 0.9 mm (1-1/2 x 1/2 x

0.0359 inch) thick sheet steel hat channel reinforcement welded to underside midway between front and back and extending full length of shelf.

4. Weld shelves to metal back and ends unless shown adjustable.

5. Provide means of positive locking shelf in position, and to permit adjustment without use of tools.

I. Table Leg:

1. 3” diameter by 27” high leg.

2. Weight capacity: 30 lbs.

2. 4 HARDWARE

A. Factory installed.

B. Exposed hardware, except as specified otherwise, satin finished stainless steel.

C. Cabinet Hardware: ANSI BHMA A156.9.

1. Door/Drawer Pulls:

a. Stainless steel wire pulls 4” centers.

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2. Cabinet Door Catch:

a. Install at bottom of wall cabinets, top of base cabinets and top and bottom of full height cabinet doors over 1200 mm (48 inches).

b. Omit on doors with locks.

3. Drawer Slides:

a. Full extension stainless steel 150 pound rated.

4. Butt Hinges:

a. Institutional type, five knuckle projecting barrel hinges, minimum 2-1/2” long Type 302 or 304 stainless steel.

b. Two hinges per door except use three hinges on doors 1200 mm (48 inches) and more in height. Use stainless steel leaves for tilting bin doors.

c. Do not weld hinges to doors or cabinets.

5. Shelf Supports:

a. Install in casework where adjustable shelves are noted.

6. Auxiliary Hardware: ANSI A156.16.

7. Door silencers: LO3011 or LO3031.

a. Install two rubber bumpers each door.

b. Silencers set near top and bottom of jamb.

8. Closet Bar: L03131 chrome finish of required length.

2. 5 METAL FINISHES

A. Stainless Steel: Mechanical finish No. 4 on sheet except No. 7 on tubing.

PART 3 - EXECUTION

3.1 COORDINATION

A. Before installing casework, verify wall and floor surfaces covered by casework have been finished.

B. Verify location and size of mechanical and electrical services as required.

C. Verify reinforcement of walls and partitions for support and anchorage of casework.

3.2 FASTENINGS AND ANCHORAGE

A. Do not anchor to wood ground strips.

B. Provide hat shape metal spacers where fasteners span gaps or spaces.

C. Use 6 mm (1/4 inch) diameter toggle or expansion bolts, or other appropriate size and type fastening device for securing casework to walls or floor. Use expansion bolts shields having holding power beyond tensile and shear strength of bolt and breaking strength of bolt head.

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D. Use 6 mm (1/4 inch) diameter hex bolts for securing cabinets together.

E. Use 6 mm (1/4 inch) by minimum 38 mm (1-1/2 inch) length lag bolt anchorage to wood blocking for concealed fasteners.

F. Use not less than No. 12 or 14 wood screws with not less than 38 mm (1-

1/2 inch) penetration into wood blocking.

G. Space fastening devices 300 mm (12 inches) on center with minimum of three fasteners in 900 or 1200 mm (three or four foot) unit width.

H. Anchor floor mounted cabinets with a minimum of four bolts through corner gussets. Anchor bolts may be combined with or separate from leveling device.

I. Secure cabinets in alignment with hex bolts or other internal fastener devices removable from interior of cabinets without special tools. Do not use fastener devices which require removal of tops for access.

J. Where units abut end to end anchor together at top and bottom of sides at front and back. Where units are back to back anchor backs together at corners with hex bolts placed inconspicuously inside casework.

K. Where type, size, or spacing of fastenings is not shown or specified, show on shop drawings proposed fastenings and method of installation.

3.3 CLOSURES AND FILLER PLATES

A. Close openings larger than 6 mm (1/4 inch) wide between cabinets and adjacent walls with flat, steel closure strips, scribed to required contours, or machined formed steel fillers with returns, and secured with sheet metal screws to tubular or channel members of units, or bolts where exposed on inside.

B. Where ceilings interfere with installation of sloping tops, omit sloping tops and provide flat steel filler plates.

1. Secure filler plates to casework top members, unless shown otherwise.

2. Secure filler plates more than 150 mm (six inches) in width top edge to a continuous 25 by 25 mm (one by one inch) 0.889 mm thick steel formed steel angle with screws.

3. Anchor angle to ceiling with toggle bolts.

C. Install closure strips at exposed ends of pipe space and offset opening into concealed space.

D. Paint closure strips and fillers with same finishes as cabinets.

E. Caulk and seal laboratory furniture as specified in Section 07 92 00, JOINT SEALANTS.

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3.4 CABINETS

A. Install in available space; arranged for safe and convenient operation and maintenance.

B. Align cabinets for flush joints except where shown otherwise.

3.5 PROTECTION TO FIXTURES, MATERIALS, AND EQUIPMENT

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

B. Thoroughly clean interior and exterior of cabinets, at completion of all work.

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