11B-302 Floor or Ground Surfaces — 2025 California Building Code
California Building Code (Title 24, Part 2) · 2025 edition · updated 2026-09-25 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Building Code (Title 24, Part 2) § 11B-302 · Effective January 1, 2026 · Official source: Building Standards Commission
11B- 302.1 General. Floor and ground surfaces shall be stable, firm and slip resistant and shall comply with Section 11B- 302 .
Exceptions:
Within animal containment areas, floor and ground surfaces shall not be required to be stable, firm and slip resistant.
Areas of sport activity shall not be required to comply with Section 11B- 302 .
11B- 302.2 Carpet. Carpet or carpet tile shall be securely attached and shall have a firm cushion, pad, or backing or no cushion or pad. Carpet or carpet tile shall have a level loop, textured loop, level cut pile, level cut/uncut pile texture. Pile height shall be 1/2 inch ( 12.7 mm) maximum. Exposed edges of carpet shall be fastened to floor surfaces and shall have trim on the entire length of the exposed edge. Carpet edge trim shall comply with Section 11B- 303 .
FIGURE 11B- 302.2—CARPET PILE HEIGHT
11B- 302.3 Openings. Openings in floor or ground surfaces shall not allow passage of a sphere more than 1/2 inch ( 12.7 mm) diameter except as allowed in Sections 11B- 407.4.3, 11B- 409.4.3, 11B- 410.4, 11B- 810.5.3 and 11B- 810.10. Elongated openings shall be placed so that the long dimension is perpendicular to the dominant direction of travel.
FIGURE 11B- 302.3—ELONGATED OPENINGS IN FLOOR OR GROUND SURFACES
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