07 72 00 Roof Accessories.pdf

Lexington VAMC July 7, 2021 Correct Various Mechanical System Deficiencies Addendum 02 Lexington, KY Project No. 596A4-19-102

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SECTION 07 72 00

ROOF ACCESSORIES

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies roof hatches; equipment supports; gravity ventilators; and metal grating roof walkway system.

1.2 RELATED WORK

A. Section 01 81 13, SUSTAINABLE CONSTRUCTION REQUIREMENTS: Sustainable

Design Requirements.

B. Section 07 22 00, ROOF AND DECK INSULATION: Rigid insulations for roofing.

C. Section 07 92 00, JOINT SEALANTS: Sealant material and installation.

1.3 QUALITY ASSURANCE

A. Provide roof accessories that are the products of manufacturers regularly engaged in producing the kinds of products specified.

B. For each accessory type provide the same product made by the same manufacturer.

C. Assemble each accessory to the greatest extent possible before delivery to the site.

1.4 SUBMITTALS

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

DATA, AND SAMPLES.

B. Sustainable Design Submittals, as described below:

1. Postconsumer and preconsumer recycled content as specified in

PART 2 - PRODUCTS.

C. Samples: Submit representative sample panel of color anodized aluminum not less than 101 x 101 mm (4 x 4 inches). For extrusions, submit width not less than section to be installed. Show coating with integral color and texture and include manufacturer's identifying label.

D. Shop Drawings: Each item specified showing design, details of construction, installation and fastenings.

E. Manufacturer's Literature and Data: Each item specified.

F. Certificates: Stating that aluminum has been given specified thickness of anodizing.

1.5 APPLICABLE PUBLICATIONS

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

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B. ASTM International (ASTM):

A653/A653M-20...........Steel Sheet, Zinc-Coated (Galvanized) or Zinc-

Iron Alloy-Coated (Galvannealed) By the Hot-Dip

Process

B209-14.................Aluminum and Aluminum-Alloy Sheet and Plate

B209M-14................Aluminum and Aluminum-Alloy Sheet and Plate

(Metric)

B221-14.................Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Shapes, and Tubes

B221M-13................Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Shapes, and Tubes (Metric)

C726-17.................Mineral Wool Roof Insulation Board

C1289-19................Faced Rigid Cellular Polyisocyanurate Thermal

Insulation Board

D1187/D1187M-97(2018)...Asphalt-Base Emulsions for Use as Protective

Coatings for Metal

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

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

D. American Architectural Manufacturers Association (AAMA):

2603-20.................Performance Requirements and Test Procedures for Pigmented Organic Coatings on Aluminum

Extrusions and Panels (with Coil Coating

Appendix).

2605-20.................Performance Requirements and Test Procedures for Superior Performing Organic Coatings on

Architectural Extrusions and Panels (with Coil

Coating Appendix).

611-14..................Anodized Architectural Aluminum

621-02..................High Performance Organic Coatings on Coil

Coated Architectural Hot Dipped Galvanized

(HDG) and Zinc-Aluminum Coated Steel Substrates

E. American Society of Civil Engineers (ASCE):

ASCE/SEI 7-16...........Minimum Design Loads and Associated Criteria for Buildings and Other Structures

F. U.S. Occupational Safety and Health Standards (OSHA):

29 CFR 1910 Subpart D... Walking-Working Surfaces (1910.21-1910.30)

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PART 2 - PRODUCTS

2.1 MATERIALS

A. Aluminum, Extruded: ASTM B221M (B221).

B. Aluminum Sheet: ASTM B209M (B209).

C. Galvanized Sheet Steel: ASTM A653/A653M; G-90 coating.

D. Recycled Content of Metal Products: Postconsumer recycled content plus one-half of preconsumer recycled content not less than 30 percent.

E. Asphalt Coating: ASTM D1187/D1187M, Type I, quick setting.

2.2 EQUIPMENT SUPPORTS

A. Supported Load Capacity: See mechanical drawings.

B. Fabricate equipment supports from 1.3 mm (0.0516 inch) thick galvanized

ASTM A653/A653M steel fabricate with welded corners and with seams joined by continuous water and air tight welds.

C. Equipment supports to be internally reinforced with angles 1.22 m

(48 inches) on center.

D. Form exterior curb with integral base, and deck closures for curbs installed on steel decking.

E. Use galvanized steel liners for curbs having inside dimension over

305 mm (12 inches).

F. Internally insulate with 38 mm (1-1/2 inch) glass-fiber board insulation (ASTM C726).

G. Fabricate curb with a minimum height of 203 mm (8 inches) above roof surface.

H. Attach preservative treated wood nailers to top of curb. Provide 50 mm

(2 inch) by 50 mm (2 inch) minimum nominal size on curb with openings and 50 mm (2 inch) thick, width of curb up to 305 mm (12 inches) on equipment support curbs.

I. Make size of supports suit size of equipment furnished, with height as shown on construction documents, but not less than 203 mm (8 inches) above roof surface.

J. Top of Equipment Supports: Level with pitch built into curb when deck slopes. Equip supports with water diverter or cricket on side that obstructs water flow.

K. Finish: Match Existing.

2.3 FINISH:

A. In accordance with NAAMM AMP 500 Series.

B. Aluminum, Mill Finish: AA-MIX, as fabricated.

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C. Baked-Enamel or Powder-Coat Finish: AAMA 2603 except with a minimum dry film thickness of 0.04 mm (1.5 mils). Comply with coating manufacturer’s written instructions for cleaning, conversion coating, and applying and baking finish.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install roof specialties where indicated on construction documents.

B. Secure with fasteners in accordance with manufacture's printed installation instructions and approved shop drawings unless shown otherwise.

C. Coordinate to install insulation where shown; see Section 07 22 00, ROOF AND DECK INSULATION.

D. Comply with section 07 92 00, JOINT SEALANTS to install sealants where required by manufactures installation instructions require sealant.

E. Coordinate with roofing work for installation of items in sequence to prevent water infiltration.

1. After completion of base flashing bend down cap flashing flange and secure to blocking with screws.

2. Install expansion joint cover with 6 mm (1/4 inch) wide space at end joints and tension bars at 610 mm (24 inches) on center.

3. Install cover plates with formed aluminum flashing concealed and centered on joint. Flashing to lap cover not less than 101 mm

(4 inches).

F. Equipment Supports: Do not anchor to insulating concrete or metal deck.

Anchor only to building structure as per manufacturers recommendations.

3.2 PROTECTION OF ALUMINUM

A. Provide protection for aluminum against galvanic action wherever dissimilar materials are in contact, by painting the contact surfaces of the dissimilar material with two (2) coats of asphalt coating

(complete coverage), or by separating the contact surfaces with a preformed neoprene tape having pressure sensitive adhesive coating on side.

B. Paint aluminum in contact with wood, concrete and masonry, or other absorptive materials, that may become repeatedly wet, with two coats of asphalt coating.

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3.3 ADJUSTING

A. Adjust roof hatch hardware to operate freely and so that cover will operate without binding, close tightly at perimeter, and latch securely.

3.4 PROTECTION

A. Protect roof accessories from damage during installation and after completion of the work from subsequent construction.

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