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UL H505
Steel C-Joist (Load-Bearing)
| Fire Rating | 2 hours |
| System STC | n/a |
| System IIC | n/a |
| System Thickness | 14 7/8 in. |
Assembly Construction
Assembly Construction
Layer 1 - 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 2 - Steel Joists:
1 layer 8" Min. Deep, 16 ga., Spaced 24" Max. O.C.
Layer 3 - Clip Angles (Not Shown):
1 layer One Clip Angle Per Joist End; One Clip Angle per Joist End
Layer 4 - Joist Bridging (Not Shown):
1 layer Cut and Bent Rim Track Screw Attached at Each End to Joists, With 1-1/2" X 20 ga. Galvanized Steel Flat Strap Bracing Attached to Bottom of Joist Flange
Layer 5 - Air Space:
1 layer 4" Min. Between Bottom Flange of Joist and Main Runners
Layer 6 - Insulation:
1 layer 3-1/2" Thick Glass Fiber Batt Insulation
Layer 7 - 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):; 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 8 - Main Runners:
1 layer 4' O.C. Main Runners Suspended by 12 ga. Min. Hanger Wire, 16" O.C.
Layer 9 - Cross Tees:
1 layer 16" O.C.
Layer 10 - Cross Channels:
1 layer 16" O.C.
Layer 11 - Wall Angle or Channel:
1 layer Painted or Galvanized Steel Angle to Support Steel Framing Member Ends and for Screw-Attachment of the Gypsum Panel (UL Type DGL)
Layer 12 - Gypsum Panel:
1 layer 5/8" [15.9 mm] Sheetrock® EcoSmart Gypsum Panel (UL Type ULIX™)
Notes