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 Bar Joist Framing Acoustical Performance Reference<br />
Construction Detail Description Test Number STC Test Number Index<br />
clg. wt. 2 • 1/2" Sheetrock <strong>Fire</strong>code C Core<br />
gypsum panels<br />
– 3-5/8" 25 gauge steel studs 24" o.c.<br />
– studs wire tied to open web steel joists 24" o.c.<br />
– joints finished<br />
GA-FC-1105 B-1<br />
18 – 2-1/2" concrete on riblath over joist<br />
5 ⁄8"<br />
clg. wt. 4 • 5/8" red top ® brand gypsum plaster, sanded<br />
1:2-1:3<br />
– 3/8" riblath metal lath<br />
GA-FC-1180 B-2<br />
14 – 2" concrete on riblath over joist<br />
– steel bar joists 24" o.c.<br />
5 ⁄8"<br />
18 1 ⁄2"<br />
1-1/2 Hour <strong>Fire</strong>-Rated Construction<br />
18 5 ⁄8"<br />
22"<br />
• 5/8" or 3/4" FR-83; 5/8" or 3/4" FR-2; or UL Des G201 B-3<br />
3/4" FR-X1 acoustical ceiling panels<br />
• DXL, DXLA, DXLZ, DXLZA, SDXL, SDXLA or<br />
ZXLA Susp Exp Grid System<br />
– light fixture and speakers optional<br />
– 2" concrete on riblath over bar joists<br />
• <strong>USG</strong> DGL drywall suspension system UL Des G528 B-4<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 over bar joist<br />
• 1/2" x 2' x 4' FC-CB gypsum panels UL Des G259 B-5<br />
• DXL, DXLA, DXLH, DXLZ, SDLX, SDXLA, ZXLA<br />
Susp Exp Grid System<br />
– 2-1/2" concrete on riblath over bar joist<br />
24 <strong>USG</strong> <strong>Fire</strong>-<strong>Resistant</strong> <strong>Assemblies</strong>