2514 Reinforced Gypsum Concrete — 2025 Building Code (CBC)

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.

Exceptions & meaning →

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:

The overall thickness, including the formboard, is not less than 2 inches (51 mm).
The clear span of the gypsum concrete between supports does not exceed 33 inches (838 mm).
Diaphragm action is not required.
The design live load does not exceed 40 pounds per square foot (psf) (1915 Pa).

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CALIFORNIA BUILDING CODE – MATRIX ADOPTION TABLE

CHAPTER 26 – PLASTIC

(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

Adopting agency	BSC	BSC- CG	SFM	HCD			DSA			OSHPD							BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
Adopting agency	BSC	BSC- CG	SFM	1	2	1/AC	AC	SS	SS/CC	1	1R	2	3	4	5	6	6	6	6	6	6	6	6	6
Adopt entire chapter	X		X	X	X			X	X	X	X	X	X	X	X	X
Adopt entire chapter as amended (amended sections listed below)
Adopt only those sections that are listed below
Chapter / Section

The state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.

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Exceptions & meaning →