Fire-Resistant Assemblies - USG Corporation

B
Floor/Ceilings
Steel Framed
1 Hour Fire-Rated Construction Steel C-Joist Framing Acoustical Performance Reference
Construction Detail Description Test Number STC IIC Test Number Index
32 USG Fire-Resistant Assemblies
39 USG-760105
Based on 9-1/2" 16 gauge steel
joists
clg. wt. 4 • Two layers 1/2" Sheetrock Firecode C Core UL Des L524 B-44
9 5 ⁄8"
gypsum panels
– 7" 18 gauge steel joists 24" o.c.
• USG DGL Drywall Suspension System
43 USG-760310
Based on 9-1/2" 16 gauge steel
joists and 3" mineral wool batt
56 USG-760106
Based on 9-1/2" 16 gauge steel
joists and carpet pad
60 USG-760405
Based on 9-1/2" 16 gauge steel
joists and carpet pad with 3"
mineral wool batt
clg. wt. 4 – 15/32" wood subfloor
– 7" 18 gauge steel joist, 24" o.c.
• 2 layers 1/2" Sheetrock Firecode C Core
UL Des L524 B-45
9
gypsum panel
• 3/4" Levelrock floor underlayment
• optional SRM-25 or SRB sound mat
• USG DGL Drywall Suspension System
1 ⁄4"
clg. wt. 3 • 1/2" Sheetrock Firecode C Core GA-FC-1145 B-47
gypsum panels
– RC-1 channel or equivalent
– 6" 18 gauge structural steel joists 24" o.c.
10 1 ⁄2"
1-1/2 Hour Fire-Rated Construction
– joints finished
– 2" concrete on steel deck
48 USG-771101
clg. wt. 5 • Two layers 5/8" Sheetrock Firecode C Core UL Des L527 B-48
11 7 ⁄8"
gypsum panels
– 3/4" T&G plywood floor
– 9-3/8" 16 gauge steel joists 24" o.c.
– RC-1 channel or equivalent
– joints finished
51 SA-781110
Based on carpet and pad