UL L1302-hr Fire RatingRoof/CeilingLoad-Bearing
Gypsum BoardFiberglass BattDesign
Wood Truss Roof/Ceiling — 2 layers 5/8" Type X gypsum board
UL-listed 2-hour fire-rated wood truss roof/ceiling assembly. 2x10 wood rafters at 16" o.c. with R-38 blown fiberglass, 2 layers of 5/8" Type X gypsum board ceiling, 1/2" plywood sheathing.
Cross-Section Diagram
Legend
1Roof covering(varies)
21/2" plywood sheathing(1/2")
32x10 wood rafters at 16" o.c.(12"-24")
4R-38 blown fiberglass
55/8" Type X gypsum board(5/8")
65/8" Type X gypsum board(5/8")
Specifications
Fire Rating
2-Hour
Load Bearing
Yes
Total Thickness
15.25"
Applicable Codes
IBC 2024 Table 722.1IRC R302.1
Construction Summary
2x10 wood rafters at 16" o.c. with R-38 blown fiberglass, 2 layers of 5/8" Type X gypsum board ceiling, 1/2" plywood sheathing
Material Layers
Important Notice
This assembly listing is for reference only. Always verify against the current UL Product iQ database before specifying in construction documents. Material substitutions may void the fire rating. Consult with a qualified fire protection engineer for project-specific requirements.