Typical assembly (not a tested listing)
4-Hour Fire Rated Wood Joist Floor/Ceiling — 4 layers 5/8" Type X gypsum board
Typical 4-hour fire-rated wood joist floor/ceiling assembly. TJI wood I-joists at 24" o.c. with R-38 fiberglass batt, 4 layers of 5/8" Type X gypsum board ceiling. Illustrative example of typical construction — not a tested UL or GA listing. Use a listed design (UL Product iQ or GA-600) for construction documents.
TJI wood I-joists at 24" o.c. with R-38 fiberglass batt, 4 layers of 5/8" Type X gypsum board ceiling
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- Layer-by-layer components with thicknesses
- Cross-section diagram
- Applicable code sections and test standard
- 6 related assemblies