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<br />Ordinance 1533, Arti~ 5 (Flood Hazard Reducti04lt continued <br /> <br />(1) Obtain the elevation (in relation to mean sea level) of the <br />bottom of the lowest structural member of the lowest floor <br />(excluding pilings and columns) of all new and substantially <br />improved structures, and whether or not such structures <br />contain a basement. The Floodplain Administrator shall <br />maintain a record of all such information. <br /> <br />(2) All new construction shall be located landward of the reach <br />of mean high tide. <br /> <br />(3) All new construction and substantial improvements shall be <br />elevated on pilings and columns so that: <br /> <br />(i) the bottom of the lowest horizontal structural member <br />of the lowest floor (excluding the pilings or columns) <br />is elevated to or above the base flood level; <br /> <br />(ii) the pile or column foundation and structure attached <br />thereto is anchored to resist flotation, collapse and <br />lateral movement due to the effects of wind and water <br />loading acting simultaneously on all building <br />components. Wind and water loading valves shall each <br />have a one percent change of being equalled or exceeded <br />in any given year (100-year mean recurrence interval); <br /> <br />(iii) a registered professional engineer or architect shall <br />develop or review the structural design, specification <br />and plans for the construction and shall certify that <br />the design and methods of construction to be used are <br />in accordance with accepted standards of practice for <br />meeting the provisions of (3)(i) and (ii) of this <br />section. <br /> <br />(4) Provide that all new construction and substantial <br />improvement have the space below the lowest floor either <br />free of obstruction or constructed with nonsupporting <br />breakaway walls, open wood lattice-work, or insect screening <br />intended to collapse, displacement, or other structural <br />damage to the elevated portion of the building or supporting <br />foundation system. <br /> <br />For the purpose of this section, a breakaway wall shall have <br />a design safe loading resistance of not less than 10 and no <br />more than 20 pounds per square foot. Use of breakaway walls <br />which exceed a design safe loading resistance of 20 pounds <br />per square foot (either by design or when so required by <br />local or state codes) may be permitted only if a registered <br />professional engineer or architect certifies that the <br />designs proposed meet the following conditions: <br />-23- <br />