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SECTION 07 72 16 – ROOFTOP SUPPORTS FOR EQUIPMENT SCREENS
PART 1 - 	GENERAL
1.1	SUMMARY
A.	Section Includes:
1.	Fixed, aluminum rooftop supports for equipment screens
B.	See Division 5 Section "Structural Metal Framing" and “Steel Decking” for attachment of equipment rails to roof structure.
C.	See Division 7 Section applicable to roofing material penetrations and resealing
1.2	PERFORMANCE REQUIREMENTS
A.	Design:  Design framing and equipment rails, including comprehensive engineering analysis by a qualified engineer, using structural performance requirements and design criteria indicated.
B.	Structural Performance:  Framing shall withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated without permanent deformation of framing components, noise or metal fatigue, or permanent damage to fasteners and anchors.
1.	Wind Loads:  Determine loads based on a uniform pressure of 30 lb./sq. ft. (1435 Pa), acting inward or outward.
2.	Deflection Criteria: Framing member deflection shall not exceed L/120
1.3	SUBMITTALS
A.	Product Data:  For each type of product indicated.
B.	Shop Drawings:  For structural framing system and accessories.  Include plans, elevations, sections, details, and attachments to other work.  Show frame locations, sizes, and components required.
C.	Samples:  For each type of metal finish required.
D.	Submittal:  For structural framing system indicated to comply with structural performance requirements and design criteria indicated.
PART 2 - 	PRODUCTS
2.1	MATERIALS
A.	Aluminum Extrusions:  ASTM B 221M, Alloy 6063-T5.
B.	Aluminum Sheet:  ASTM B 209M, Alloy 3003 with temper as required for forming.
C.	Fasteners:  Use types and sizes to suit unit installation conditions.
1.	Use 300 series stainless-steel fasteners.
2.2	FABRICATION, GENERAL
A.	Join frame members to each other and to connection brackets with threaded fasteners. Join equipment rail components with fillet welds.
2.3	ROOFTOP SUPPORTS FOR EQUIPMENT SCREENS
A.	Aluminum Base Supports and Structural Framing
1.	Basis-of-Design Product: “Sturdistruct” framing by Architectural Louvers Co. (Harray, LLC). Subject to compliance with requirements, provide the specified product or comparable product by one of the following:
a.	Manufacturers of equivalent products submitted and approved in accordance with Section 01630 - Product Substitution Procedures.
2.	Base Support Thickness: Not less than 0.080 inch (2.03 mm)
3.	Frame Member Thickness: Not less than 0.125 inch (3.2 mm)
4.	Curb Cap Thickness: Not less than 0.125 inch (3.2 mm)
5.	Connection Bracket Thickness: Not less than 0.250 inch (6.4 mm)
6.	Component Design Requirements:
a.	Posts and Girts shall be 3 inch x 3 inch (76 mm x 76 mm) profiles with slots for easy attachment to other components
b.	Kicker Braces and Racking Braces shall be 1-1/2 inch x 1-1/2 inch (38 mm x 38 mm) profiles with slots for easy attachment to other components.
c.	Connection Brackets shall have minimum 4 holes per leg for acceptance of 5/16 inch (8 mm) fasteners.
2.4	ALUMINUM AND STAINLESS STEEL FINISHES
A.	Mill finish
PART 3 - 	EXECUTION
3.1	INSTALLATION
A.	Install base supports and framing in accordance with manufacturer’s printed instructions.
B.	Locate and place base supports level, plumb, and at indicated locations per project drawings provided by the manufacturer.
C.	Repair any roof penetrations per the original roofing material manufacturer’s instructions.
D.	Posts and Girts shall be level and plumb to accept equipment screens being supported.
E.	Repair damaged surfaces so no evidence remains of corrective work.  Return items that cannot be repaired to the manufacturer for replacement.
END OF SECTION 10 82 00