Technical Bulletin 6, Below-Grade Parking Requirements

NFIP Technical Bulletin 6 (2021) provides detailed guidance on the requirements for dry floodproofing below-grade parking areas under non-residential and mixed-use buildings located in Special Flood Hazard Areas (SFHAs) designated as Zone A. The bulletin outlines NFIP regulations, relevant building codes and standards, and the certification process for dry floodproofing designs. It addresses design considerations, limitations, flood protection levels, and implications for NFIP flood insurance. The document is intended for design professionals, code officials, and others involved in the planning, design, and approval of flood-resistant below-grade parking in flood hazard zones.