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Cornerstone Innovative Specialties LLC
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ROOf assemblies

Design No. P523 - 1 and 1-1/2 Hr

Design No. P523 - 1 and 1-1/2 Hr

Design No. P523 - 1 and 1-1/2 Hr

 Any UL Class A, B or C Roofing System (TGFU) or Prepared Roof Covering (TFWZ) or Prepared Roof-covering Materials, Formed or Molded Metal, Fiber-Cement, Plastic or Fire-retardant-treated Wood (TFXX) acceptable   steel roof deck and structural cement-fiber units may be installed. The steel roof deck is to consist of corrugated or fluted steel form units, minimum 9/16 in. deep, 22 MSG painted or galv steel, welded or mechanically fastened at a max. 12 in. OC to the top chord of the roof trusses (Item 1). Nominal 19 mm (3/4 in.) thick structural cement-fiber units installed over the steel roof deck and secured to trusses with fasteners spaced a max of 12 in. OC. Batts and Blankets (Item 8) must be used and the Class A, B or C Roofing System must include application over structural cement-fiber units. 

Design No. P526 - 1 and 1-1/2 Hr

Design No. P523 - 1 and 1-1/2 Hr

Design No. P523 - 1 and 1-1/2 Hr

 Any UL Class A, B or C Roofing System (TGFU) or Prepared Roof Covering (TFWZ) acceptable  steel roof deck and structural cement-fiber units or building units may be installed. The steel roof deck is to consist of corrugated or fluted steel form units, minimum 9/16 in. deep, 22 MSG painted or galv steel, welded or mechanically fastened at a max. 12 in. OC to the top chord of the roof trusses (Item 1). Nominal 19 mm (3/4 in.) thick structural cement-fiber units or building units installed over the steel roof deck and secured to trusses with fasteners spaced a max of 12 in. OC. Batts and Blankets (Item 8) must be used and the Class A, B or C Roofing System must include application over structural cement-fiber units. 

DESIGN NO. P557 - 1 AND 1-1/2 HR

Design No. P523 - 1 and 1-1/2 Hr

DESIGN NO. P557 - 1 AND 1-1/2 HR

Any UL Class A, B or C Roofing System (TGFU) or Prepared Roof Covering (TFWZ) acceptable steel roof deck and structural cement-fiber units may be installed. The steel roof deck is to consist of corrugated or fluted steel form units, minimum 9/16 in. deep, 22 MSG painted or galv steel, welded or mechanically fastened at a max. 12 in. OC to the top chord of the roof trusses (Item 1). Nominal 19 mm (3/4 in.) thick structural cement-fiber units installed over the steel roof deck and secured to trusses with fasteners spaced a max of 12 in. OC. Batts and Blankets (Item 8) must be used and the Class A, B or C Roofing System must include application over structural cement-fiber units.

Design No. P566 - 1 and 1-1/2 Hr

Design No. P566 - 1 and 1-1/2 Hr

DESIGN NO. P557 - 1 AND 1-1/2 HR

 Any UL Class A, B or C Roofing System (TGFU) or Prepared Roof Covering (TFWZ) acceptable  steel roof deck and structural cement-fiber units may be installed. The steel roof deck is to consist of corrugated or fluted steel form units, minimum 9/16 in. deep, 22 MSG painted or galv steel, welded or mechanically fastened at a max. 12 in. OC to the top chord of the roof trusses (Item 1). Nominal 19 mm (3/4 in.) thick structural cement-fiber units installed over the steel roof deck and secured to trusses with fasteners spaced a max of 12 in. OC. Batts and Blankets (Item 7) must be used and the Class A, B or C Roofing System must include application over structural cement-fiber units. 

Design No. P569 - 1 HR

Design No. P566 - 1 and 1-1/2 Hr

Design No. P569 - 1 HR

Any UL Class A, B or C Roofing System (TGFU) or Prepared Roof Covering (TFWZ) acceptable steel roof deck and structural cement-fiber units may be installed. The steel roof deck is to consist of corrugated or fluted steel form units, minimum 9/16 in. deep, 22 MSG painted or galv steel, welded or mechanically fastened at a max. 12 in. OC to the top chord of the roof trusses (Item 1). Nominal 19 mm (3/4 in.) thick structural cement-fiber units installed over the steel roof deck and secured to trusses with fasteners spaced a max of 12 in. OC. Batts and Blankets (Item 8) must be used and the Class A, B or C Roofing System must include application over structural cement-fiber units.

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