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Earlier editions: 20222019

Chapter 3 — GENERAL REGULATIONS

301.6 Tall Wood (Mass Timber) Buildings — 2025 California Plumbing Code

California Plumbing Code (Title 24, Part 5) · 2025 edition · updated 2026-10-19 · 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 Plumbing Code (Title 24, Part 5) § 301.6 · Effective January 1, 2026 · Official source: Building Standards Commission

Plumbing systems installed in tall wood (mass timber) buildings, shall comply with the following:

(1) Be designed by a licensed plumbing contractor or a registered design professional in accordance with this code and the building code.

(2) Be designed to accommodate expansion, contraction, and differential movement between parts of a tall wood (mass timber) building in accordance with Section 312.2.

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▸Contents — California Plumbing Code (Title 24, Part 5)
California Plumbing Code (Title 24, Part 5)

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