Chapter 25 — GYPSUM PANEL PRODUCTS AND PLASTER
Section 2514 — REINFORCED GYPSUM CONCRETE
2025 California Building Code (Title 24, Part 2) · 2025 edition · ingested 2026-07-07 · California
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2514.1 General. ¶
2514.1 General. Reinforced gypsum concrete shall comply with the requirements of ASTM C317 and ASTM C956. Exception: [DSA-SS and OSHPD 1, 1R, 2, 4 & 5] Reinforced gypsum concrete shall be considered as an alternative system, except for [OSHPD 2] single-story Type V skilled nursing or intermediate care facilities utilizing wood-frame or light-steel-frame construction.
2514.2 Minimum thickness. ¶
2514.2 Minimum thickness. The minimum thickness of reinforced gypsum concrete shall be 2 inches (51 mm) except the minimum required thickness shall be reduced to 1 [1] / 2 inches (38 mm), provided that the following conditions are satisfied: 1. The overall thickness, including the formboard, is not less than 2 inches (51 mm). 2. The clear span of the gypsum concrete between supports does not exceed 33 inches (838 mm). 3. Diaphragm action is not required. 4. The design live load does not exceed 40 pounds per square foot (psf) (1915 Pa). 25-10 2025 CALIFORNIA BUILDING CODE on Jul 18, 2025 11:14…