Quantcast

Fire Rated System Design - UL G523

Print This Page

UL G523

Steel Bar Joist

Fire Rating

hour

Restrained‐2 hour


Restrained‐2 hour


STC / Sound Test

N/A

System Thickness

N/A

Fire Rating

Restrained‐2 hour

Unrestrained‐2 hour

System Thickness

N/A

  • Floor Substrate - Min. 2-1/2 in. (64 mm) thick concrete
  • Steel Deck - Min. 9/16 in. (14 mm) deep 28 ga. corrugated steel deck
  • Structural Members - Steel bar joists spaced max. 24 in. (609 mm) OC
  • Ceiling Support - Suspension system
  • Finished Ceiling - 1/2 in. (13 mm) or 5/8 in. (16 mm) thick gypsum board
Remarks
  • Stud size is minimum unless otherwise stated in design.
  • For the most up-to-date information refer to the UL Fire resistance directory G523 ·