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Fire Rated System Design - UL G556 or GA-FC-1800

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UL G556 or GA-FC-1800 - Featured

Steel C-Joist

Fire Rating

hour

Restrained‐2 hour


STC / Sound Test

N/A

System Thickness

N/A

Fire Rating

Unrestrained‐2 hour

System Thickness

N/A

  • Floor Underlayment - Min.1/2 in. (13 mm) thick gypsum-fiber board
  • Floor Substrate - Concrete structural panel subfloor
  • Structural Members - Min. 10 in. (254 mm) deep 16 ga. steel C-Joists max. 24 in. (610 mm) OC
  • Ceiling Support - Resilient channels spaced max. 12 in. (305 mm) OC or 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 G556 ·