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Fire-Resistant Assemblies - USG Corporation

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B<br />

Floor/Ceilings<br />

Steel Framed<br />

2 Hour <strong>Fire</strong>-Rated Construction Steel Bar Joist Framing Acoustical Performance Reference<br />

Construction Detail Description Test Number STC Test Number Index<br />

clg. wt. 2 • 5/8" Sheetrock <strong>Fire</strong>code Core<br />

gypsum panels<br />

– steel bar joists 24" o.c.<br />

– metal furring channel, 12" o.c.<br />

UL Des G503 53 NGC-4075<br />

B-12<br />

16"<br />

15 7 ⁄8"<br />

21"<br />

24"<br />

21"<br />

24"<br />

• 1/2" Sheetrock <strong>Fire</strong>code C Core GA-FC-2030 B-13<br />

gypsum panels<br />

– metal furring channel 24" o.c.<br />

– steel bar joists 24" o.c.<br />

– joints finished<br />

– 2-1/2" concrete on riblath or steel deck over joist<br />

• optional veneer plaster<br />

• 1/2" or 5/8" Sheetrock <strong>Fire</strong>code C Core UL Des G523 B-14<br />

gypsum panels<br />

• <strong>USG</strong> DGL Drywall Suspension System<br />

– joints finished<br />

– 2-1/2" concrete on riblath or steel deck<br />

– steel bar joists, 24".o.c.<br />

– 3 hour rating with 5/8" panels and 3" thick<br />

concrete<br />

• optional veneer plaster<br />

• <strong>USG</strong> DGL Drywall Suspension System UL Des G526 B-15<br />

• 1/2" or 5/8" Sheetrock <strong>Fire</strong>code C Core<br />

gypsum panels<br />

– joints finished<br />

– 2-1/2" concrete on riblath<br />

– steel bar joists, 24" o.c.<br />

• optional veneer plaster<br />

clg. wt. 2 • 1/2" x 24" x 24" FC-CB gypsum panels<br />

• DXL, DXLA, DXLH, DXLZ, DXLZA, SDXL,<br />

or SDXLA Susp Exp Grid System<br />

– light fixtures and air ducts optional<br />

UL Des G222 B-16<br />

22"<br />

– 2-1/2" concrete deck on riblath or corrugated<br />

steel deck<br />

– steel bar joists, 24" o.c.<br />

26 <strong>USG</strong> <strong>Fire</strong>-<strong>Resistant</strong> <strong>Assemblies</strong>

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