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Earlier editions: 20222019

Appendix A — GUIDELINES FOR THE SEISMIC RETROFIT OF EXISTING BUILDINGS

A109 Analysis and Design Procedure — 2025 California Existing Building Code

California Existing Building Code (Title 24, Part 10) · 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 Existing Building Code (Title 24, Part 10) § A109 · Effective January 1, 2026 · Official source: Building Standards Commission

A109.1 General.

[BS] A109.1 General. The elements of buildings hereby required to be analyzed are specified in Table A102.1.

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A109.2 Selection of procedure.

[BS] A109.2 Selection of procedure. Buildings with rigid diaphragms shall be analyzed by the general procedure of Section A110. Buildings with flexible diaphragms shall be analyzed by the general procedure or, where applicable, are permitted to be analyzed by the special procedure of Section A111.

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▸Contents — California Existing Building Code (Title 24, Part 10)

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