Ordinance 2001-142 - Laserfiche WebLink

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Section B. SPECIFIC STANDARDS. In all areas of special flood hazard where base flood elevation data have been provided, as set forth in Article 3, Section B, or Article 4, Section C (11), the following provisions are required: (I) Residential Construction. New construction or substantial improvement of any residential structure (or manufactured home) shall have the lowest floor, including basement elevated no lower than ten feet (10') OOo'/e the base flood elevation. Should solid foundation perimeter walls be used to elevate a structure, openings sufficient to facilitate the unimpeded movements of floodwaters shall be provided in accordance with the standards of Article 5, Section B (3). (2) Non-Residential Construction. New construction or substantial improvement of any commercial, industrial, or non-residential structure (or manufactured home) shall have the lowest floor, including basement, elevated no lower than ten (1 Q) feet aeeve the base flood elevation. Structures located in A-zones, together with attendant utility and sanitary facilities, may be flood-proofed in lieu of elevation provided that all areas of the structure below the base flood elevation are designed to be water tight, with walls substantially impermeable to the passage of water and structural components having the capability of resisting hydrostatic and hydrodynamic loads and the effect of buoyancy. A registered professional engineer or architect shall certify that the design and methods of construction are in accordance with accepted standards of practice for meeting the provisions above and shall provide such certification to the official as set forth above and in Article 4, Section C(9). (3) Elevated Buildings. New construction or substantial improvements of existing elevated structures that include any fully enclosed area located below base flood elevation and formed by foundation and other exterior walls shall be designed so as to be a flood resistant or oofinished enolosW"e and designed to preclude finished living space and to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters. (a) Designs for complying with this requirement must either be certified by a professional engineer or architect or meet the following criteria: (i) Provide a minimum of two openings having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding; (ii) The bottom of all openings shall be no higher than one foot above grade; and (iii) Openings may be equipped with screens, louvers, valves or other coverings or devices provided they permit the automatic flow of floodwaters in both directions. Flood Damage Prevention Ord, Legislation/Ordinancesl Attorney 10/2/01 --3:55 PM 14