2001 ASD Supplements - unprotected PDF - American Wood Council

ASD STRUCTURAL LUMBER SUPPLEMENTL-37Figure 6.8One-Hour Fire-Rated Wood Floor/Ceiling Assembly(2x10 Wood Joists 16” o.c. – Gypsum Directly Applied or on Optional Resilient Channels)61. Nom. 1 in. wood flooring or 19/32 in. T&G plywoodunderlayment (single floor). Oriented Strand Board(OSB) panels are permitted for certain designs.2. Building paper.3. Nom. 1 in. T&G boards or 15/32 in. plywood subfloor.Subfloors for certain designs may be nom. 7/16 in.OSB.4. ½ in. Type X gypsum wallboard (may be attached directlyto joists or on resilient channels) or 5/8 in. TypeX gypsum wallboard directly applied to joists.Fire Tests:½ in. Type X gypsum directly appliedUL R1319-66, 11-9-64, Design L512;UL R3501-45, 5-27-65, Design L522;UL R2717-38, 6-10-65, Design L503;UL R3543-6, 11-10-65, Design L519;ULC Design M502½ in. Type X gypsum on resilient channelsUL R1319-65, 11-16-64, Design L514OTHER CONSIDERATIONS5. 2x10 Wood joists spaced 16 in. o.c.5/8 in. Type X Gypsum directly appliedUL R3501-5, 9, 7-15-52;UL R1319-2, 3, 6-5-52, Design L 501;ULC Design M500AMERICAN FOREST & PAPER ASSOCIATION