Quantcast

Fire Rated System Design - UL G531

Print This Page

UL G531

Steel Bar Joist

Fire Rating

hour

Restrained‐1 hour


Restrained‐1 hour


STC / Sound Test

N/A

System Thickness

N/A

Fire Rating

Restrained‐1 hour

Unrestrained‐1 hour

System Thickness

N/A

  • Floor Substrate - Min. 2 3/16 in. (56 mm) thick concrete
  • Steel Deck - Min. 1 5/16 in. (34 mm) deep 24 ga. corrugated steel deck
  • Structural Members - Steel bar joists spaced max. 24 in. (609 mm) OC
  • Ceiling Support - Suspension system
  • Finished Ceiling - 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 G531 ·