Anchoring

The purpose of this page is to define anchoring, a commonly used term in floodplain management.

Definition/Description

If a proposed building site is in a flood-prone area, all new construction and substantial improvements shall be designed (or modified) and adequately anchored to prevent flotation, collapse, or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy. There are specific requirements for manufactured homes and structures in V Zones.

National Flood Insurance Program (NFIP) Requirement

•    60.3 - Flood plain management criteria for flood-prone areas
  •    (a) (3) (i) - General Requirement
  •    (b) (8) - Manufactured Homes
  •    (e) (4) - Zone V Buildings

Other Applicable NFIP Regulations

•    60.3 - Flood plain management criteria for flood-prone areas
  •    (c) (6) - Manufactured Homes
  •    (c) (12) (ii) - Manufactured Homes

Guidance

• IS-9 Managing Floodplain Development Through The National Flood Insurance Program (NFIP)
  • (page 5-40)
  • (page 5-43) - Manufactured Homes
  • (page 5-49) - V Zone Construction 5-49

Related Keywords

• Accessory Structures
• Foundation
• Hydrodynamic Forces
• Hydrostatic Forces
• Manufactured (Mobile) Home
• V-Zone Certificate

Special Topic Resources

• Manufactured Home Anchoring  
  • Manufactured Home Installation in Flood Hazard Areas (FEMA 85) pp. 28 - 31
•  V-Zone Anchoring  
  • Coastal Construction Manual (FEMA 55) - Connections, Floor Support Beam to Foundation p. 12-57 
  • Technical Bulletin 8, Corrosion Protection for Metal Connectors in Coastal Areas (FIA-TB-8)