New flood load provisions to help protect against 500-year flood events

The American Society of Civil Engineers (ASCE, released ASCE 7-22 Supplement on Flood Loads. ASCE’s most frequently used standard, ASCE/SEI 7-22: Minimum Design Loads and Associated Criteria for Buildings and Other Structures now features a new supplement, updated with new flood load provisions that protect against 500-year flood events. The previous ASCE/SEI 7-22 edition only included 100-year flood hazards.

As quoted in the ASCE press release on the ASCE 7-22 Supplement on Flood Loads, Ronald Hamburger, P.E., S.E., F.SEI, Senior Principal with Simpson Gumpertz & Heger Inc., and Chair of the ASCE 7-22 Committee states “ASCE continuously seeks to update its standards using the latest scientific and engineering knowledge, to assure the standards remain relevant to society’s needs and an appropriate basis for design and construction.”

Primary technical updates relative to future weather and climate extremes feature new requirements connecting flood hazard mitigation design to risk category, a feature consistent across the other environmental hazards in ASCE 7. Further, the four types of the intended use of the structure range from the least risk to human life in the event of a failure in Risk Category I structures to the most significant risk in Risk Category IV structures.

About ASCE 7: Minimum Design Loads and Associated Criteria for Buildings and Other Structures (ASCE/SEI 7-22)

“An integral part of building codes in the United States, ASCE/SEI 7, Minimum Design Loads and Associated Criteria for Buildings and Other Structures describes the means for determining design loads including dead, live, soil, flood, tsunami, snow, rain, atmospheric ice, seismic, and wind loads and their combinations for general structural design.  Structural engineers, architects, and building code officials will find the structural load requirements essential to their practice.”

© 2023 American Society of Civil Engineers. All rights reserved.

(Source: American Society of Civil Engineers)

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