Fire-Resistant Assemblies - USG Corporation

B
14 1 ⁄4"
Floor/Ceilings
Steel Framed
3 Hour Fire-Rated Construction Steel Bar Joist Framing Acoustical Performance Reference
Construction Detail Description Test Number STC Test Number Index
clg. wt. 3, clg. wt. 4 • 5/8" Sheetrock Firecode C Core gypsum panels
– metal furring channel 24" o.c.
– joints finished
UL Des G512 B-36
16"
– 2-1/2" concrete on corrugated steel deck
or riblath
– steel bar joists, 24" o.c.
• optional veneer plaster
211 clg. wt. 3 • USG DGL Drywall Suspension System
• 1/2" or 5/8" Sheetrock Firecode C Core
gypsum panels
– joints finished
⁄4"
– 3-1/4" concrete on riblath or corrugated
steel deck
– steel bar joists, 24" o.c.
clg. wt. 4 – 3/4" cold rolled channel furred or suspended
– 3.4 lb diamond mesh metal lath
– 7/8" neat wood fiber gypsum plaster
– 2-1/2" concrete on riblath or 28 gauge
14"
corrugated steel deck
– steel bar joist
clg. wt. 4 • Alternate based on 5/8" 1:2-1:3 red top
gypsum plaster-vermiculite or 7/8" red top
wood fiber plaster neat
15 3 4 Hour Fire-Rated Construction
clg. wt. 5 – 3/4" cold rolled channel furred or suspended
• 7/8" 1:2-1:3 red top gypsum plastervermiculite
– 3/8" riblath metal lath
⁄8"
– 2-1/2" concrete on riblath
– steel bar joists, 24" o.c.
31 USG Fire-Resistant Assemblies
UL Des G529 B-37
BMS-92 B-38
GA-FC-3140 B-39
BMS-92 B-43