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APPENDIX M TSUNAMI-GENERATED FLOOD HAZARDS

State amendments integrated8 filed sections2021 editionEffective January 1, 2023

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APPENDIX M
TSUNAMI-GENERATED FLOOD HAZARDS

The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance.

SECTION M101
REFUGE STRUCTURES FOR VERTICAL
EVACUATION FROM TSUNAMI-GENERATED
FLOOD HAZARDS

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.

SECTION M102
REFERENCED STANDARDS

M102.1 General.

See Table M102.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix that reference the standard.

TABLE M102.1

REFERENCED STANDARDS

STANDARD ACRONYM	STANDARD NAME	SECTIONS HEREIN REFERENCED
ASCE 7—16 with Supplement 1	Minimum Design Load and Associated Criteria for Buildings and Other Structures	M101.2, M101.3
FEMA P646—12	Guidelines for Design of Structures for Vertical Evacuation from Tsunamis	M101.4

Source and transcript record

Record South Carolina · 2021 IBC · APPENDIX M TSUNAMI-GENERATED FLOOD HAZARDS

Effective January 1, 2023 · source captured Aug 30, 2026

Transcript SHA-256 c0f9c9a24a2edadb24196338048b2a5652aab776eeb0eeb3d67e69768cc6cd10 · text SHA-256 5bcf045be9e9d7ec8473589beb94f7dfd8324a5bfedd981f3b3aa24316089343

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