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SEAOC Recommended Investigation and Design Guidelines for Foundations Exposed to Fire

February 27, 2025 5:24 PM | Anonymous

This document is a compilation of two recommended guidelines with different objectives. The first presents criteria for the investigation of foundations exposed to fire, and the second presents design criteria for foundations exposed to fire. Discussion of concrete and masonry wall elements is also included. This document should not be taken as a general endorsement or encouragement to reuse any concrete or masonry element exposed to fire.

Additional geotechnical evaluation may be necessary to assess the feasibility of reusing any individual foundation, including retaining walls and their footings.

Additionally, plumbing, mechanical, electrical and any other systems passing through the foundation are beyond the scope of the structural assessment, however these systems should also be evaluated.

When considering rebuilding efforts, the impact of removing and reconstructing foundations on carbon pollution should not be ignored. It is recommended that the owner consult a design professional about the environmental impact of using or not reusing existing foundations.

Following the removal of debris, an assessment of the soil should be conducted to assess if the soil contains any contaminants. This assessment should follow local regulations and be performed by a licensed consultant.

It should be noted that reuse of an existing foundation may have an impact on eligibility to receive financial support from various federal, state, or private entities including but not limited to FEMA and insurance companies. Owners are advised to consult relevant agencies regarding whether reusing a foundation could affect eligibility for federal or state grants, insurance companies’ funds, or other financial aid.

This document is based on the report document, “Investigation Guideline for Foundations and Soils Affected by Fire,” dated 1/9/2019, which was prepared by Degenkolb Engineers and Ninyo & Moore Geotechnical & Environmental Sciences Consultants and presented to the City of Ventura in 2018, following the Thomas Fire of December 2017.

This document has been further modified by the Structural Engineers Association of California (SEAOC) Wildfire Task Group in January 2025 for specific distribution to Southern California Authorities Having Jurisdiction (AHJ’s) in response to the fires around Los Angeles during January 2025.

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The Structural Engineers Association of Southern California (SEAOSC) is a professional association with a rich history and a commitment to shaping the future of structural engineering. This legacy continues to affect the field, as SEAOSC remains a dynamic platform for knowledge sharing, professional development, and community engagement.

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