Ord 2012-029 - Laserfiche WebLink

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(b) All new construction and substantial improvements of nonresidential structures within Zone AO must: i. have the lowest floor (including basement) elevated above the highest adjacent grade at least as high as the depth number specified in feet on the FIRM (at least two feet if no depth number is s ecified), or ii. together with attendant utility and sanitary facilities be completely flood proofed to that level to meet the flood proofing standard specified in paragraph (3)(a) of this section. (4) Elevated Structures. For all new construction or substantial improvements full enclosed areas below the lowest floor elevation may be usable solely for parking of vehicles, building access, or storage. These enclosed areas must be designed and constructed to allow for the entry and exit of floodwaters to automaticallv eaualize hydrostatic flood forces on exterior walls (a) Designs for meeting this requirement must be certified by a professional engineer or architect, to meet or exceed the following minimum criteria: i. 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 must be provided, ii. The bottom of all openings must be no higher than one foot above rg ade and iii. Openings may be equipped with screens louvers valves or other coverings or devices provided they provide the required net area of the openings and permit the automatic entry and exit of floodwaters (b) Access to the enclosed area must be the minimum necessary to allow for parking of vehicles (garage door) or limited storage of maintenance equi ment used in connection with the premises (standard exterior door) or entry to the living area (stairway or elevator) and (c) The interior portion of the enclosed areas may not be partitioned temperature - controlled, or finished into separate rooms. (5) Until a regulatory floodway is designated no new construction substantial improvements, or other development (including fill) shall be permitted within Zones A 1 -30 and AE_ on the FIRM, unless it is demonstrated that the cumulative effect of the proposed development, when combined with all other existing and anticipated development, will not increase the water surface elevation of the base flood more than one foot at any point within the community. (6) Within zones AH or AO, adequate drainage paths shall be required around structures on slopes to guide floodwaters around and away from posed structures 22