Chapter 3 — GENERAL REGULATIONS
316.5 Fire-Resistant Construction — 2025 California Mechanical Code
California Mechanical Code (Title 24, Part 4) · 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 Mechanical Code (Title 24, Part 4) § 316.5 · Effective January 1, 2026 · Official source: Building Standards Commission
Piping, tubing, and duct system penetrations of fire-resistance-rated walls, parti
For SI units: 1 inch = 25.4 mm tions, floors, floor/ceiling assemblies, roof/ceiling assemblies, or shaft enclosures shall be protected in accordance with the requirements of the California Building Code or California Residential Code .
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