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Original Request
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Request ID:
8498
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Date Submitted:
December 28, 2020
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Requested By: David Johnson
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Code:
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Edition:
2017
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Chapter:
Chapter 3 Building Planning
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Section:
R322.1.4
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Topic:
Design Flood Elevation
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Question:
Is it the intent of R322.1.4 (Establishing the design flood elevation) #1 to use the definition of the 100 year storm elevation found in section 3109 FBC which refers the Department of Environmental Protection (DEP) and establishes the elevation for locations seaward of the Coastal Construction Control Line (CCCL)?
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Comments:
The question revolves around the use of R322 which is titled Flood-Resistant Construction. Section 322.1 indicates this section applies to properties in the Special Flood Hazard Area (SFHA) and are located in either A or V zones. For the properties located in an "X" zone, or outside of the SFHA would this also apply if the property is located seaward of the CCCL? Further, the DEP model appears to indicate it applies to the "lowest structural horizontal member" only and not all of the construction. As an example, if a property is located seaward of the CCCL, partially in an AE-6, partially in an X for the SFHA zones and the lowest floor is the garage slab located at an elevation of 8, meeting or exceeding the AE6 and freeboard requirements, and the bottom of the lowest horizontal structural element supporting the habitable floors above is located at the DEP requirement of 16, do the requirements for construction in the flood zone still apply? These requirements would be things such as frangible walls, no electrical, mechanical or plumbing installed in the area and all equipment such as condensers, water heaters and so required to be installed above the DEP required elevation.
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