A. New construction and substantial improvement of residential structures and manufactured dwellings within AO zones shall have the lowest floor, including basement, elevated above the highest grade adjacent to the building, to or above one foot (1') above the specified depth on the flood insurance rate maps (FIRM) (at least two feet (2') if no depth number is specified). For manufactured dwellings the lowest floor is considered to be the bottom of the longitudinal chassis frame beam.
B. New construction and substantial improvements of non-residential structures within AO zones shall either:
1. Have the lowest floor (including basement) elevated above the highest adjacent grade of the building site, to or above one foot (1') above the depth number specified on the flood insurance rate maps (FIRMS) (at least two feet (2') if no depth number is specified); or
2. Together with attendant utility and sanitary facilities, be completely floodproofed to or above one foot (1') above the depth number specified on the FIRM at a minimum of two feet (2') above the highest adjacent grade if no depth number is specified, so that any space below that level is watertight with walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy, if this method is used, compliance shall be certified by a registered professional engineer or architect as stated in section 10-5-2-3-3-A4.
C. Recreational vehicles placed on sites within AO zones on the community's flood insurance rate maps (FIRM) shall either:
1. Be on the site for fewer than one hundred eighty (180) consecutive days, and
2. Be fully licensed and ready for highway use, on its wheels or jacking system, is attached to the site only by quick disconnect type utilities and security devices, and has no permanently attached additions; or
3. Meet the elevation requirements of section 10-5-2-5-2A, and the anchoring and other requirements for manufactured dwellings of section 10-5-2-3-4.
D. In AO zones, new and substantially improved appurtenant structures must comply with the standards in section 10-5-2-3-6.
E. In AO zones, enclosed areas beneath elevated structures shall comply with the requirements in section 10-5-2-1. (Ord. 666-20, 10-13-2020)