320 [bsc, DSA-Ss & DSA-Ss/Cc]—method a — 2025 California Existing Building Code

California Existing Building Code (Title 24, Part 10) · 2025 edition · updated 2026-09-25 · California

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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) § 320 · Effective January 1, 2026 · Official source: Building Standards Commission

320.1 General.¶

The retrofit design shall employ the Linear Static or Linear Dynamic Procedures of ASCE 41, Section 7.4.1 or 7.4.2, and comply with the applicable general requirements of ASCE 41, Chapters 6 and 7. The earthquake hazard level and performance level given specified in Section 317.5 for the building’s risk category shall be used. Structures shall be designed for seismic forces coming from any horizontal direction.

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

California Existing Building Code (Title 24, Part 10)

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