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UL P561
Steel C-Joist (Load-Bearing)
| Fire Rating | 1.5 hours |
| System STC | n/a |
| System IIC | null |
| System Thickness | Varies |
Assembly Construction
Assembly Construction
Layer 1 - Roof Covering:
1 layer 5/8" Thick Gypsum Fiber Roof Board (UL Type FRX-G™)
Layer 2 - Structural Cement-Fiber Units:
1 layer 3/4" Thick, USG Structural Panel Concrete Subfloor (USGSP), with long edges tongue and grooved, long dimension of panels to be perpendicular to Joists (UL Type USGSP)
Layer 3 - Steel Joists:
1 layer 10" Deep, 16ga., Spaced 24" Max. O.C.
Layer 4 - Clip Angles (Not Shown):
1 layer One Clip Angle per Joist End
Layer 5 - Insulation:
1 layer 3-1/2" Thick Glass Fiber Batt Insulation
Layer 6 - Resilient Channel:
1 layer 1/2" 25ga. Resilient Channel Spaced 16" O.C.
Layer 7 - Gypsum Panel:
1 layer 5/8" [15.9 mm] Sheetrock® EcoSmart Gypsum Panel (UL Type ULIX™)
Notes
- For the most up-to-date fire-resistance ratings, refer to the UL Online Certifications Directory.
- Estimated range of acoustical performance is based on laboratory test data of similarly constructed assemblies.