Appendix M — TSUNAMI-GENERATED FLOOD HAZARDS
M101 Refuge Structures for Vertical Evacuation from Tsunami-Generated Flood… — 2025 California Building Code
California Building Code (Title 24, Part 2) · 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 Building Code (Title 24, Part 2) § M101 · Effective January 1, 2026 · Official source: Building Standards Commission
M101.1 General.¶
The purpose of this appendix is to provide tsunami vertical evacuation planning criteria for those coastal communities that have a tsunami hazard as shown in a Tsunami Design Zone Map.
M101.2 Definitions.¶
The following term shall, for the purposes of this appendix, have the meaning shown herein. Refer to Chapter 2 of this code for general definitions.
TSUNAMI DESIGN ZONE MAP. A map that designates the extent of inundation by a Maximum Considered Tsunami, as defined by Chapter 6 of ASCE 7.
M101.3 Establishment of tsunami design zone.¶
Where applicable, the Tsunami Design Zone Map shall meet or exceed the inundation limit given by the ASCE 7 Tsunami Design Geodatabase .
M101.4 Planning of tsunami vertical evacuation refuge structures within the tsunami design zone.¶
Tsunami Vertical Evacuation Refuge Structures located within a tsunami hazard design zone shall be planned, sited, and developed in general accordance with the planning criteria of the FEMA P646 guidelines.
Exception: These criteria shall not be considered mandatory for evaluation of existing buildings for evacuation planning
purposes.
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