Architectural · A-9SKMX

Three-Hour Rated Shaft Wall Assembly

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A three-hour rated shaft wall assembly consists of C-H or back-to-back E-shaped shaft wall studs with one-inch gypsum shaft liner board on one side and three layers of 5/8-inch gypsum board on the symbol side. Sound attenuation blankets are included in the cavity where scheduled. The accompanying schedule details stud sizes of 2-1/2 inches, 4 inches, and 6 inches, corresponding partition thicknesses ranging from 4-3/8 inches to 7-7/8 inches, STC ratings, and UL Design U415 compliance.

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