*Code Version	2010
*Sub Code	Building
*Chapter & Topic	Chapter 16
*Section	1612.4
Related Modifications
*Summary of Modification	Permit dry floodproofing of nonresidential buildings in flood hazard areas identified as Coastal A Zones if designed in accordance with ASCE 24 to account for wave loads and the potential for erosion and local scour.
*Text of Modification	1612.4.1 Modification to ASCE 24-05. Table 6-1 and Section 6.2.1 in ASCE 24 shall be modified as follows: 1. The title of Table 6.1 shall be “Minimum Elevation of Floodproofing, Relative to Base Flood Elevation (BFE) or Design Flood Elevation (DFE), in Coastal A Zones and in Other Flood Hazard Areas that are Not – ~~[RCQ1]~~ ~~Outside of~~ High Risk Flood Hazard Areas.” 2. Section 6.2.1 shall be modified to permit dry floodproofing in Coastal A Zones, as follows: “Dry floodproofing of nonresidential structures and nonresidential areas of mixed-use structures shall not be allowed unless such structures are located outside of High Risk Flood Hazard areas, and Coastal High Hazard Areas~~, and Coastal A Zones~~. Dry floodproofing shall be permitted in Coastal A Zones provided wave loads and the potential for erosion and local scour are accounted for in the design.”

RATIONALE FOR GLITCH PROPOSAL FOR CAZ AND DRY FLOODPROOFING

(a) Whether the proposed code change falls within the glitch criteria stated above,

The proposed code change is within glitch criteria permitted for inconsistencies with federal regulations.

(b) Whether the proposed code change has a Florida specific need, and

Many reaches of Florida coast are designated as Zone V (Coastal High Hazard Area) on FEMA Flood Insurance Rate Maps. The landward limit of Zone V is where waves predicted to occur during the base flood fall below 3-ft in height. Inland of these areas are flood hazard areas where conditions during the base flood develop waves between 1.5 ft and 3 ft high; these areas are called Coastal A Zones for the purpose of designing and constructing buildings within the scope of the 2010 Florida Building Code, Building. Over the past 30-40 years many Florida communities have, as allowed under Federal regulations for the NFIP, permitted dry floodproofing measures to be used for nonresidential buildings located in these areas now called Coastal A Zones. Experience has shown these measures, if properly designed, protect against base flood conditions. The proposed code change authorizes the continued use of dry floodproofing measures in accordance with the standard referenced by Section 1612.4 (ASCE 24, Flood Resistant Design and Construction).

This code change will allow small businesses to dry floodproof buildings in Coastal A Zones, which increases the options available for providing the required level of protection.