22-19 - Amend Chapter 1308 flood damage prevention following FEMA flood zone update - ordinance

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coastal high hazard areas designated zone V or VE on the City's effective FIRM and when designated on a preliminary or final FIRM issued by FEMA under the circumstances provided in Section 1308.03(m). The re- quirements of this subsection 0) also apply to development in Moderate Wave Action areas, within zone AE between a Limit of Moderate Wave Action and the landward limit of zone V or VE designated on the City's effective FIRM, or between a Limit of Moderate Wave Action and the offshore limit of the City's jurisdiction where zone V or VE is not des- ignated on the City's effective FIRM. (1) All new construction and substantial improvements shall be ele- vated on pilings or columns that may be armored as necessary to with- stand Lake Erie ice forces so that: A. The bottom of the lowest horizontal structural member supporting the lowest floor (excluding the pilings or columns) is elevated to or above the flood protection elevation, and B. The pile or column foundation and structure attached thereto is an- chored to resist flotation, collapse and lateral movement due to the ef- fects of wind and water loads acting simultaneously on all building com- ponents. i. Water loading values shall be those associated with the base flood. ii. Wind loading values shall be those defined according to American Society of Civil Engineers 7 -13 Minimum design loads and associated criteria for buildings and other structures, or current version adopted by Ohio Board of Building Standards. iii. A registered professional engineer or architect shall develop or re- view the structural design, specifications 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 subsection 0)(1)A and B of this section. (2) All new construction and substantial improvements shall 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 without causing collapse, displacement, or other structural damage to the elevated portion of the building or sup- porting foundation system. A. For the purpose of this subsection 0)(2), a breakaway wall shall have a design safe loading resistance of not less than 10 and no more than 20 pounds per square foot. B. Use of breakaway walls which exceed a design safe loading re- sistance of 20 pounds per square foot (either by design or where so re- quired by local or state codes) may be permitted only if a registered pro- fessional engineer or architect certifies that the designs proposed meet all of the following conditions: i. Breakaway wall collapse shall result from a water load less than that which would occur during the base flood; and ii. The elevated portion of the building and supporting foundation sys- tem 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 non - structural). Water load- ing values shall be those associated with the base flood. Wind loading values shall be those defined according to American Society of Civil En- gineers 7 -16 Minimum design loads and associated criteria for buildings and other structures, or equivalent standard. iii. All space enclosed by breakaway walls, open wood lattice -work, or insect screening below the lowest floor shall be used solely for parking of vehicles, building access, or storage. 39