123100 Metal Casework for RFI 29 Answer - 506-20-102.pdf

Amendment 05 – 5/17/2023 Ann Arbor VAMC: Project #506-20-102 Upgrade Basement Bldg. 1-West

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SECTION 12 31 00

MANUFACTURED METAL CASEWORK

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies full height metal cabinets.

1.2 QUALITY ASSURANCE

A. Approval by Contracting Officer Representative (COR) is required of manufacturer and installer based upon certification of qualifications specified.

B. Manufacturer’s Qualifications:

1. Manufacturer is regularly engaged in design and manufacture of metal of scope and type similar to requirements of this project for a period of not less than five (5) years.

2. Manufacturer has successfully completed at least three (3) projects of scope and type similar to requirements of this project.

3. Submit manufacturer’s qualifications and list of projects.

C. Installer Qualifications:

1. Installer has completed at least three (3) projects in least five (5) years in which these products were installed.

2. Submit installer qualifications.

1.3 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.

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.

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.

2. Fastenings and method of installation.

E. Manufacturer’s warranty.

F. Color Samples:

1. Submit full range of manufacturer’s standard colors for selection by VA COR /Interior Designer.

1.4 WARRANTY

A. Construction Warranty: Comply with FAR clause 52.246-21 “Warranty of Construction”.

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B. Manufacturer Warranty: Manufacturer shall warranty their wood casework for a minimum of five (5) years from date of installation and final acceptance by the Government. Submit manufacturer warranty.

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-19 .................................Carbon Structural Steel

A240/A240M-22b ...........................Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

A283/A283M-18 .............................Low and Intermediate Tensile Strength Carbon Steel Plates

A568/A568M-19a ...........................Steel, Sheet, Carbon and High-Strength, Low-Alloy Hot-Rolled and

Cold-Rolled, General Requirements

A794/A794M-18 .............................Standard Specification for Commercial Steel (CS), Sheet, Carbon

(0.16% Maximum to 0.25% Maximum) Cold Rolled

B456-17(2022) ................................Electrodeposited Coatings of Copper Plus Nickel Plus Chromium and

Nickel Plus Chromium

C1036-21 .........................................Flat Glass

C1048-18 .........................................Heat-Strengthened and Fully Tempered Flat Glass

C1172-19 .........................................Laminated Architectural Flat Glass

C. American National Standard Institute:

Z97.1-2015 ......................................Safety Glazing Material used In Buildings

D. Builders Hardware Manufacturers Association (BHMA):

A156.1-16 ........................................Butts and Hinges

A156.5-20 ........................................Auxiliary Locks and Associated Products

A156.9-15 ........................................Cabinet Hardware

A156.11-19 ......................................Cabinet Locks

A156.16-18 ......................................Auxiliary Hardware

E. American Welding Society (AWS):

D1.1/D1.1M-20 ...............................Structural Welding Code Steel

D1.3/D1.3M-18 ...............................Structural Welding Code Sheet Steel

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

AMP 500 Series ..............................Metal Finishes Manual

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

PS 1-09 ............................................Construction and Industrial Plywood

H. Underwriters Laboratories Inc. (UL):

325-17 .............................................Door, Drapery, Gate, Louver, and Window Operators and Systems

437-13 .............................................Key Locks

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I. Federal Specifications (Fed. Spec.):

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

Threading Anchors)

J. Scientific Equipment and Furniture Association (SEFA):

2.3-10 ..............................................Installation of Scientific Laboratory Furniture and Equipment

PART 2 - PRODUCTS

2.1 MATERIALS

A. Sheet Steel:

1. ASTM A794/A794M, cold rolled, Class 1 finish, stretcher leveled.

2. Other types of cold rolled steel meeting requirements of ASTM A568/A568M are acceptable for concealed parts.

B. Stainless Steel: ASTM A240/A240M, Type 302B.

C. Glass:

1. ASTM C1048 Kind FT Type I, Class 1, Quality q3.

2. For Doors: Laminated Glass - Fabricate of two sheets of 3 mm (1/8 inch) thick clear ASTM C1172, Kind LT glass, laminated together with a 1.5 mm (0.060 inch) thick vinyl interlayer, to a total overall thickness of 8 mm (5/16 inch).

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: Chrome plated steel or stainless steel, or finished to match adjacent surface.

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

3. Expansion Bolts: Fed Spec. A-A-55615. Do not provide 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. Manufacturer of casework assemblies is to assume complete responsibility for the final assembled unit.

B. Provide products of a single manufacturer for parts which are alike.

2.3 CASEWORK FABRICATION

A. General:

1. Welding: Comply with AWS Standards D1.1/D1.1M and D1.3/D1.3M.

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

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

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B. Minimum Steel Thickness:

Thickness Steel Description (where applicable)

0.89 mm (0.035 inch) (20 gage)

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 (3 inches) or more. Tables legs, spreaders and stretchers, when fabricated of cold rolled tubing. 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.

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.

8. Do not install 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 be fastened, end to end or back to back.

9. Fabricate casework with finished end panels.

10. Close flush exposed soffits of wall hung shelving, knee spaces in counters, and toe spaces at bases.

11. In base units with doors provide removable backs.

12. Provide reinforcing for hardware.

13. Size Dimensions:

a. Use dimensions shown on construction documents or within tolerances specified.

b. Tolerance:

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Type of Cabinet

Depth Nominal Dim inch

Plus Tolerance (mm (inch))

Minus Tolerance (mm (inch))

- Depth 18 50 (2) 0 (0)

- Width 36 0 (0) 25 (1)

Floor Standing Cabinet

Height 72-84 25 (1) 0 (0)

1) Manufacturer's Tolerance for the same Length, Depth or Height of Cabinet: 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 on construction documents, provide toe space at front recessed

76 mm (3 inches).

E. Doors:

1. Hollow metal type, flush and glazed doors not less than 16 mm (5/8 inch) thick.

2. Fabricate flush metal doors of two (2) panels formed into pans with corners welded and ground smooth. Provide flush doors with a sound deadening core.

3. Fabricate glazed metal doors with reinforced frame and construct either from one (1) 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.

4. Provide sheet steel hinge reinforcement inside doors.

F. Sloping Tops:

1. Provide sloping tops.

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

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

G. Shelves:

1. Capable of supporting an evenly distributed minimum load of 122 kg per square meter (25 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. Weld shelves to metal back and ends unless shown on construction documents as adjustable.

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

2.4 HARDWARE

A. Factory installed.

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B. Exposed hardware, except as specified otherwise, satin finished chromium plated brass or nickel plated brass or anodized aluminum.

C. Cabinet Hardware: ANSI BHMA A156.9.

1. Door Pulls: B02011.

a. Provide door pulls of a design that can be operated with a force of 22.2 N (5 pounds) or less, with one (1) hand and not require tight grasping, pinching or twisting of the wrist.

2. Cabinet Door Catch:

a. Install at top and bottom of full height cabinet doors over 1220 mm (48 inches).

3. Butt Hinges:

a. B01351, minimum 1.8 mm (0.072 inch) thick chrome plated steel leaves.

b. Minimum 3.5 mm (0.139 inch) diameter stainless steel pins.

c. Full mortise type, five (5) knuckle design with 63 mm (2 1/2 inch) high leaves and hospital type tips.

d. Two (2) hinges per door except use three (3) hinges on doors 1220 mm (48 inches) and more in height. Use stainless steel leaves for tilting bin doors.

e. Do not weld hinges to doors or cabinets.

f. Continuous piano hinge acceptable in lieu of butt hinges.

4. Shelf Supports:

a. Install in casework where adjustable shelves are noted on construction documents.

b. Adjustable Shelf Standards: B04061 with shelf rest B04081.

c. Vertical Slotted Shelf Standard: B04102 with shelf brackets B04112 sized for shelf depth.

5. Auxiliary Hardware: ANSI A156.16.

6. Door silencers: LO3011 or LO3031.

a. Install two (2) rubber bumpers each door.

b. Silencers set near top and bottom of jamb.

2.5 METAL FINISHES

A. Comply with NAAMM AMP 500 series and as specified.

B. Steel Cabinets including Closures and Filler Strips:

1. Acid resisting finish except hardware and stainless steel.

2. After fabrication of cabinet submerge in a degreasing bath, and thoroughly rinse to remove dirt and grease, and other foreign matter.

3. Apply non-metallic phosphate coating, then finish with baked-on acid resisting enamel not less than 1 mil (0.001 inch) thick.

4. Finish resistant to action of the following reagents when 0.5 cm3 (10 drops) are applied to the surface and left open to the atmosphere for period of one (1) hour.

REAGENTS

Hydrochloric Acid 37 percent Ethyl Alcohol

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REAGENTS

Phosphoric Acid 75 percent Methylethyl Keytone

Sulfuric Acid 25 percent Acetone

Glacial Acetic Acid Ethyl Acetate

Sodium Hydroxide 10 percent Ethyl Ether

Sodium Hydroxide (concentrated) Carbon Tetrachloride

Hydrogen Peroxide 5 percent Xylene

Formaldehyde 37 percent Phenol 85 Percent

5. Color of finish as selected by VA COR/ Interior Designer during shop drawing review.

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

PART 3 - EXECUTION

3.1 COORDINATION

A. Begin only after work of other trades is complete, including wall and floor finish completed, ceilings installed, light fixtures and diffusers installed and connected, and area free of trash and debris.

B. Verify location and size of mechanical and electrical services as required and perform cutting of components of work installed by other trades.

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

D. Coordinate with other Divisions and Sections of the specification for work related to installation of casework systems to avoid interference and completion of service connections.

3.2 INSTALLATION

A. Install casework in accordance with manufacturer’s written instructions.

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

2. Align cabinets for flush joints except where shown otherwise on construction documents.

B. Plug Buttons:

1. Install plug buttons in predrilled or prepunched perforations not used.

2. Use chromium plate plug buttons or buttons finish to match adjacent surfaces.

C. Seal junctures of casework systems with mildew-resistant silicone sealants as specified in Section 07 92 00, JOINT SEALANTS.

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. Secure filler plates to casework top members.

C. Secure filler plates more than 152 mm (6 inches) in width top edge to a continuous 25 x 25 mm (1 x 1 inch)

0.889 mm (1/16 inch) thick steel formed steel angle with screws.

D. Anchor angle to wall with toggle bolts.

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E. Finish closure strips and fillers with same finishes as cabinets.

3.4 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.

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 305 mm (12 inches) on center with minimum of three (3) fasteners in 915 or 1219 mm (3 or 4 foot) unit width.

H. Anchor floor mounted cabinets with a minimum of four (4) 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 on construction documents, show on shop drawings proposed fastenings and method of installation.

3.5 ADJUSTMENTS

A. Adjust equipment to insure proper alignment and operation.

B. Replace or repair damaged or improperly operating materials, components or equipment.

3.6 CLEANING

A. Immediately following installation, clean each item, removing finger marks, soil and foreign matter resulting from work of this section.

B. Remove from job site trash, debris and packing materials resulting from work of this section.

C. Leave installed areas clean of dust and debris resulting from work of this section.

3.7 INSTRUCTIONS

A. Provide operational and cleaning manuals and verbal instructions in accordance with Article

INSTRUCTIONS, SECTION 01 00 00, GENERAL REQUIREMENTS.

B. Provide in service training both prior to and after facility opening. Coordinate in service activities with

COR.

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