What are the special requirements for construction in “V” Flood Zones in Unincorporated Charleston County?
Lowest Horizontal Member Elevation: The lowest horizontal structural member of all new and substantially improved structures must be elevated to a minimum of one foot above the base flood elevation indicated on the applicable flood insurance rate map. A flood elevation certificate indicating this elevation must be submitted prior to any building inspection, except for a foundation inspection. This certificate must be of the latest version available. Plan and Certificate Requirements: Wall section and foundation plans for structures in “V” flood zones must be designed and sealed by a South Carolina Registered Professional Engineer and/or Architect. Plans must detail breakaway wall construction, foundation design, and scour depth. If spread footings are used, the bottom of the footing must be a minimum of 12 inches below the anticipated scour depth at the structure location. Pre-construction “V-Zone design” and “V-Zone Breakaway wall” certificates must be submitted with the construction
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