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0 <br />abb< 12 rA,r 870 <br />(1) Residential Construction. New construction or substantial improve- <br />ment of any residential structure (including manfactured homes) <br />shall have the lowest floor., including basement, elevated no lower <br />than ( 2 feet) above the base flood elevation. should solid <br />foundation perimeter walls be used to elevate a structure, openings <br />sufficient to facilitate the unimpeded movements of flood waters <br />shall be provided. <br />(2) Non-Residential Construction. New construction or substantial <br />improvement of any commercial, industrial, or non-residential <br />structure shall have the lowest floor, including basement, elevated <br />no lower than ( 2 feet) above the level of the base flood <br />elevation. Structures located in A-zones may be flood-proofed in <br />lieu of elevation provided that all areas of the structure below <br />the required elevation are water tight with walls substantially <br />impermiable to the passage of water, using structural components <br />having the capability of resisting hydrostatic and hydrodynamic <br />loads and the effect_ of buoyancy. A registered professional <br />engineer or architect shall certify that the standards of this <br />subsection are satisfied. Such certification shall be provided <br />to the official as set forth in Article 4, Section B (5). <br />(3) Elevated Buildings. New construction or substantial improvements <br />of elevated buildings tha_ include fully enclosed areas formed by <br />foundation and other exterior walls below the base flood elevation <br />shall be designed to preclude finished living space and designed to <br />allow for the entrv and exit of floodwaters to automatically <br />6Ui:3112e nfd]:95tat 1•: I).CC'C )_OrCeS On e:'terlor Ca_-.,. <br />(a) Designs for complying with this requirement must either be <br />certified by a professional engineer or architect or meet the <br />following minimum criteria: <br />(i) Provide a minimum of two openings having a total net <br />area of not less than one square inch for every square <br />foot of enclosed area subject to flooding; <br />(ii) The bottom of all openings shall be no higher than one <br />foot above grade; and, <br />(iii) Openings may be equipped with screens, louvers, valves <br />or other coverings or devices provided they permit the <br />automatic flow of floodwaters in both directions. <br />(b) Access to the enclosed area shall be the.minimum necessary to <br />allow for parking of vehicles (garage door) or limited storage <br />of maintenance equipment used in connection with the premises <br />(standard exterior door; or entry to the 24. ing area (stairway <br />or elevator). <br />-18- <br />