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UL P562
Steel C-Joist (Load-Bearing)
| Fire Rating | 1 hours |
| System STC | n/a |
| System IIC | null |
| System Thickness | Varies |
Assembly Construction
Assembly Construction
Layer 1 - Roofing Membrane:
1 layer Ballasted, adhered or mechanically attached to the Insulation; Hot-mopped or cold-application, Class A, B or C Covering or Single-Ply Membrane
Layer 2 - Roof Insulation:
1 layer Polyisocyanurate Insulation Boards, 1" Thickness Min. with no limit on Max. Overall Thickness. Loosely laid, adhered or mechanically fastened to the Gypsum Sheathing and Structural Cement-Fiber
Layer 3 - Gypsum Board:
1 layer 1/2" Thick Min., Loosely laid, adhered or mechanically attached to Structural Cement-Fiber Units (UL Type FRX-G)
Layer 4 - 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 5 - Steel Joists:
1 layer 10" Deep, 16ga., Spaced 24" Max. O.C.
Layer 6 - Clip Angles (Not Shown):
1 layer One Clip Angle per Joist End
Layer 7 - Joist Bridging (Not Shown):
1 layer V-Bracing of 1-1/2", 20ga., Galvanized Steel between Channels
Layer 8 - Insulation:
1 layer 3-1/2" Thick Glass Fiber Batt Insulation
Layer 9 - Steel Framing Members:
1 layer Suspension System may be used in lieu of the Resilient Channels. Main Runners, Cross Tees, Cross Channels and Wall Angle as listed below (UL Type DGL):
Layer 10 - Main Runners:
1 layer 4' O.C. Main Runners suspended by 12ga. Min. Hanger Wire, 16" O.C.
Layer 11 - Cross Tees:
1 layer 16" O.C.
Layer 12 - Cross Channels:
1 layer 16" O.C.
Layer 13 - 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.