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• A. Alternative elevation methods other than the use of <br /> fill may be utilized to elevate a structure's lowest floor <br /> above the Regulatory Flood Protection Elevation. These <br /> alternative methods may include the use of stilts, pilings, <br /> parallel walls, etc. , or above-grade, enclosed areas such <br /> as crawl spaces or tuck under garages. The base or floor <br /> of an enclosed area shall be considered above-grade and not <br /> a structure' s basement or lowest floor if: 1) the enclosed <br /> area is above-grade on at least one side of the structure; <br /> 2) it is designed to internally flood and is constructed <br /> with flood resistant materials; and 3) it is used solely <br /> for parking of vehicles, building access or storage. The <br /> above-noted alternative elevation methods are subject to <br /> the following additional standards: <br /> i. Design and Certification - The structure' s <br /> design and as-built condition must be certified by a <br /> registered professional engineer or architect as being <br /> in compliance with general design standards of the <br /> State Building Code and, specifically, that all <br /> electrical, heating, ventilation, plumbing and air <br /> conditioning equipment and other service facilities <br /> must be at or above the Regulatory Flood Protection <br /> Elevation or be designed to prevent flood water from <br /> entering or accumulating within these components <br /> • during time of flooding. <br /> ii. Specific Standards for Above-grade, <br /> Enclosed Areas - Above-grade, fully enclosed areas <br /> such as crawl spaces or tuck under garages must be <br /> designed to internally flood and the design plans must <br /> stipulate: <br /> a. The minimum area of openings in <br /> the walls where internal flooding is to be used <br /> as a flood proofing technique, when openings are <br /> placed in a structure' s walls to provide for <br /> entry of flood waters to equalize pressures, the <br /> bottom of all openings shall be no higher than <br /> one (1) foot above grade. Openings may be <br /> equipped with screens, louvers, valves, or other <br /> coverings or devices provided that they permit <br /> the automatic entry and exit of flood waters. <br /> b. That the enclosed area will be <br /> designed of flood resistant materials in <br /> accordance with the FP-3 or FP-4 classifications <br /> in the State Building Code and shall be used <br /> solely for building access, parking of vehicles <br /> • or storage. <br /> 9.164 <br />