O-1987-1533-A - actual date passed 10/28/1996

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Ordinance 1533-A continul Page 25 e (b) the pile or column foundation and structure attached thereto is anchored to resist flotation, collapse and lateral movement due to the effects of wind and water loading acting simultaneously on all building components. Wind and water loading valves shall each have a one percent chance of being equaled or exceeded in any given year (1 DO-year mean recurrence interval); (c) a registered professional engineer or architect shall develop or review the structural design, specification and plans for the construction and shall certify that the design and methods of construction to be used are in accordance with accepted standards of practice for meeting the provisions of (3)(i) and (ii) of this section. (4) Provide that all new construction and substantial improvement have the space below the lowest floor either free of obstruction or constructed with non-supporting breakaway walls, open wood lattice-work, or insect screening intended to collapse and not cause displacement, or other structural damage to the elevated portion of the building or supporting foundation system. For the purpose of this section, a breakaway wall shall have a design safe loading resistance of not less than 10 and no more than 20 pounds per square foot. Use of breakaway walls which exceed a design safe loading resistance of 20 pounds per square foot (either by design or when so required by local or state codes) may be permitted only if a registered professional engineer or architect certifies that the designs proposed meet the following conditions: (a) Breakaway wall collapse shall result from a water load less than that which would occur during the base flood; and (b) The elevated portion of the building and supporting foundation system shall not be subject to collapse, displacement, or other structural damage due to the effects of wind and water loads acting simultaneously on all building components (structural and nonstructural). Maximum wind and water loading values to be used in this determination shall each have one percent change of being equaled or exceeded in any given year (1 DO-year mean recurrence interval). (5) If breakaway walls are utilized, such enclosed space shall be useable solely for parking of vehicles, building access, or storage. Such space shall not be used for human habitation.