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ORDINANCE NO. 2003- 006 equipment plumbing equipment, air conditioning: equipment and other service facilities, including ductwork, elevated to 0.5 feet one half (0.5) F^^' or more above the base flood level. All new construction and substantial improvements of nonresidential structures within Zones Al -30 [A99], AE and AH on the county's FIRM shall: a. Have the lowest floor, including basement, and electrical e ui meat, heating ecu ment. ventilation e ui ment. ,.lumbin equipment, air conditioning equipment and other service facilities. includina ductwork, elevated to 0.5 feet oiie hal (0.5) or more above the base flood level, or; b. Together with attendant utility and sanitary facilities, be designed so that any area elevated less than 0.5 feet above bei the base flood level of the structure 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. Flood -proofing measures must be operable without human intervention and without an outside source of electricity. 4. Where a nonresidential structure is intended to be made watertight below the base flood level: a. A registered professional engineer or architect shall develop and/or review structural design, specifications, and plans for the construction, and shall certify that the design and methods of construction are in accordance with accepted standards of practice for meeting the applicable provisions of section 930.07(2)(b)3. a., b. and c. or 930.07(2)(b)8. a. and b. and; b. A record of such certificates which includes the specific elevations (in relation to mean sea level) to which such structures are flood -proofed shall be maintained by the community development director. All new construction and substantial improvements, that fully enclose areas below the lowest floor that are subject to flooding shall be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters. Designs for meeting this requirement must either be certified by a registered professional engineer or architect or meet or exceed the following minimum criteria: a minimum of two (2) openings having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding shall be provided. The bottom of all openings shall be no higher than one foot above grade. Openings may be equipped with screens, louvers, valves, or other coverings or devices provided that they permit the automatic entry and exit of floodwaters. Coding: Words in strw gh are deletions from existing law. Words underlined are additions. UileserverTublic\Community Development\Users\ROLAND\Miscellaneous\LDR\930.07 mech equip freeboard\930.07 LDR amd 011603.DOC'