Ch. 20 Aluminum — 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) Chapter 20 · Effective January 1, 2026 · Official source: Building Standards Commission
User notes:
About this chapter: Chapter 20 contains standards for the use of aluminum in building construction. The use of aluminum in heating, ventilating or air-conditioning systems is addressed in the California Mechanical Code . This chapter references national standards from the Aluminum Association for use of aluminum in building construction, AA ASM 35, Aluminum Sheet Metal Work in Building Construction, and AA ADM, Aluminum Design Manual.
ICC code development note: Code change proposals to this chapter will be considered by the IBC—Structural Code Development Committee during the
2025 (Group B) Code Development Cycle.
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