2x4 Wood Studs Asymmetrical Gypsum-Fiberboard 78% load

WS4-1.3 One-Hour Fire-Resistive Wood Wall Assembly
2x4 Wood Stud Wall - 78% Design Load - ASTM E 119 / NFPA 251

1. Framing - Nominal 2x4 wood studs, spaced 16 in. o.c., double top plates, single bottom plate
2. Interior Sheathing - 5/8 in. Type X gypsum wallboard, 4 ft. wide, applied vertically, unblocked
3. Exterior Sheathing - 1/2 in. fiberboard sheathing. Alternate construction - minimum 1/2 in. lumber siding or 1/2 in. wood based sheathing.
4. Exterior Siding - 3/8 in. hardboard shiplap edge panel siding. Alternate construction - lumber, wood based, vinyl, or aluminum siding.
5. Vapor Barrier - 4-mil polyethylene sheeting
6. Insulation - 3-1/2 in. thick mineral wool insulation (2.5 pcf, nominal)
7. Gypsum Fasteners - 6d cement coated box nails spaced 7 in. o.c.
8. Fiberboard Fasteners - 1-1/2 in. galvanized roofing nails - 6 in. o.c. in the field, 3 in. o.c. panel edges
9. Hardboard Fasteners - 8d galvanized nails - 8 in. o.c. in the field, 4 in. o.c. panel edges
10. Joints and Fastener Heads - Wallboard joints covered with paper tape and joint compound, fastener heads covered with joint compound

Tests conducted at the Gold Bond Building Products Fire Testing Laboratory
Test No:WP-584 (Fire Endurance & Hose Stream) March 19, 1981

Third Party Witness: Warnock Hersey International, Inc.
Report WHI-690-003

This assembly was tested at 78% design load using an l_e/d of 33, calculated in accordance with the 1997 National Design Specification® for Wood Construction. The authority having jurisdiction should be consulted to assure acceptance of this report.