Use of breakaway walls must be certified by a registered engineer or architect and shall meet the following conditions:ġ. Breakaway wall collapse shall result from a water load less than that which would occur during the base flood andĢ. The elevated portion of the building shall not incur any structural damage due to the effects of wind and water loads acting simultaneously in the event of the base flood. A breakaway wall shall have a safe design loading resistance of not less than 10 and no more than 20 pounds per square foot. “Breakaway walls” are any type of walls, whether solid or lattice, and whether constructed of concrete, masonry, wood, metal, plastic or any other suitable building material which is not part of the structural support of the building and which is designed to break away under abnormally high tides or wave action without causing any damage to the structural integrity of the building on which they are used or any buildings to which they might be carried by flood waters. “Basement” means any area of the building having its floor subgrade, i.e., below ground level, on all sides. “Base flood” is the term used throughout this title. “Base flood” means a flood which has a one percent chance of being equaled or exceeded in any given year (also called the “100-year flood”). The area may be designated as Zone A, AE, or VE on the Flood Insurance Rate Map (FIRM). “Area of special flood-related erosion hazard” is the land within a community which is most likely to be subject to severe flood-related erosion losses. “Area of special flood hazard.” See “Special flood hazard area.” “Appeal” means a request for a review of the Floodplain Administrator’s interpretation of any provision of this title. “Apex” means the point of highest elevation on an alluvial fan, which on undisturbed fans is generally the point where the major stream that formed the fan emerges from the mountain front. “Alluvial fan” means a geomorphologic feature characterized by a cone or fan-shaped deposit of boulders, gravel, and fine sediments that have been eroded from mountain slopes, transported by flood flows, and then deposited on the valley floors, and which is subject to flash flooding, high velocity flows, debris flows, erosion, sediment movement and deposition, and channel migration. “Accessory use” means a use which is incidental and subordinate to the principal use of the parcel of land on which it is located. Unless specifically defined below, words or phrases used in this title shall be interpreted so as to give them the meaning they have in common usage and to give this title its most reasonable application.
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