Where is the lowest floor in a V Zone building measured from?

In a V Zone, which is an area subject to coastal flooding and wave action, the definition of the lowest floor is crucial for compliance with floodplain management requirements. The lowest floor is measured from the bottom of the lowest horizontal structural member, typically the bottom of the floor system or girders, that supports the building. This measurement is significant because it determines if the building is elevated appropriately to mitigate flood risks and to fulfill National Flood Insurance Program (NFIP) regulations.

This specific measurement point ensures that the structure is safely above flood levels, particularly in areas prone to wave action that can impact buildings more severely than in non-V Zone areas. Elevating the building above this point is essential to minimize flood damage and ensure safety during flood events.