U.S. flag

미국 정부 공식 웹사이트입니다

Dot gov

Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS

A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites..

alert - warning

이 페이지는한국어로(으로) 번역되지 않았습니다. 해당 언어의 리소스는 한국어 페이지를 방문해 주십시오.

Lowest Horizontal Structural Member

In V Zones, new construction must have the elevation of the lowest horizontal structural member at or above the Base Flood Elevation (BFE). Horizontal structural members are obstructions and can transmit the force of wave impacts to rest of the structure. This elevation is used as the reference level to determine insurance rates. This contrasts with construction and insurance rating in A Zones, which uses the elevation of the lowest floor including basement as the reference level. This requirement is to keep the entire building in a V Zone above the anticipated breaking wave height of a base flood storm surge.

In an elevated building, the lowest beam, joist, or other horizontal member that supports the building is the lowest horizontal structural member. Grade beams installed to support vertical foundation members where they enter the ground are not considered lowest horizontal members.

National Flood Insurance Program Requirements

  • 60.3 - Floodplain management criteria for floodprone areas
    • (e)(4) - V Zone Elevation Requirement
Glossary Section
NFIP - National Flood Insurance Program