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Fire Rated System Design - UL G502

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UL G502

Steel Bar Joist

Fire Rating

hour

Restrained‐1.5 hour


Restrained‐1.5 hour


STC / Sound Test

N/A

System Thickness

N/A

Fire Rating

Restrained‐1.5 hour

Unrestrained‐1.5 hour

System Thickness

N/A

Floor Substrate - Min. 2 in. (50 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 - Furring channels spaced max. 24 in. (609 mm) OC
  • Floor Substrate - Min. 2 in. (50 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 - Furring channels spaced max. 24 in. (609 mm) OC
  • Finished Ceiling - 1/2 in. (13 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 G502 ·