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Chapter 25: Gypsum Board, Gypsum Panel Products and Plaster
Section BC 2501: General
Section BC 2502: Definitions
Section BC 2503: Reserved
Section BC 2504: Vertical and Horizontal Assemblies
2504.1 Scope.
2504.1.1 Wood framing.
2504.1.2 Studless partitions.
Section BC 2505: Shear Wall Construction
Section BC 2506: Gypsum Board and Gypsum Panel Product Materials
Section BC 2507: Lathing and Plastering
Section BC 2508: Gypsum Construction
Section BC 2509: Showers and Water Closets
Section BC 2510: Lathing and Furring for Cement Plaster (Stucco)
Section BC 2511: Interior Plaster
Section BC 2512: Exterior Plaster
Section BC 2513: Exposed Aggregate Plaster
Section BC 2514: Reinforced Gypsum Concrete
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Section BC 2503: Reserved
Section BC 2504: Vertical and Horizontal Assemblies
2504.1 Scope.
The following requirements shall be met where construction involves gypsum board, gypsum panel products or lath and plaster in vertical and horizontal assemblies.
2504.1.1 Wood framing.
Wood supports for lath, gypsum board or gypsum panel products, as well as wood stripping or furring, shall be not less than 2 inches (51 mm) nominal thickness in the least dimension.
   Exception: The minimum nominal dimension of wood furring strips installed over solid backing shall be not less than 1 inch by 2 inches (25 mm by 51 mm).
2504.1.2 Studless partitions.
The minimum thickness of vertically erected studless solid plaster partitions of 3/8-inch (9.5 mm) and 3/4-inch (19.1 mm) rib metal lath, 1/2-inch-thick (12.7 mm) gypsum lath, gypsum board or gypsum panel product shall be 2 inches (51 mm).
Section BC 2505: Shear Wall Construction

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