Fire-Resistant Assemblies - USG Corporation
Fire-Resistant Assemblies - USG Corporation
Fire-Resistant Assemblies - USG Corporation
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B<br />
Floor/Ceilings<br />
Steel Framed<br />
1 Hour <strong>Fire</strong>-Rated Construction Steel Truss Acoustical Performance Reference<br />
Construction Detail Description Test Number STC IIC Test Number Index<br />
clg. wt. 3 • 5/8" Sheetrock <strong>Fire</strong>code C Core UL Des G540, B-50<br />
gypsum panels G542, G543, G544<br />
– RC-1 channels or equivalent<br />
– joints finished<br />
– steel trusses<br />
– insulation optional in concealed space directly<br />
over gypsum ceiling membrane<br />
– concrete floor over riblath or corrugated steel deck<br />
clg. wt. 3 • 5/8" Sheetrock <strong>Fire</strong>code C Core gypsum UL Des L549 B-51<br />
gypsum panels L551, L552, L553<br />
– RC-1 channels or equivalent<br />
– joints finished<br />
– steel trusses<br />
– insulation optional in concealed space directly<br />
over gypsum ceiling membrane<br />
– plywood flooring or floor topping mixture over<br />
plywood subflooring<br />
33 <strong>USG</strong> <strong>Fire</strong>-<strong>Resistant</strong> <strong>Assemblies</strong>
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