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Article 14 Flood Hazard Areas
14-18 Special Flood Hazard Area Standards
Wake County Unified Development Code
14-14
(B)
new nonresidential construction or major repairs of any commercial, industrial or other
nonresidential structure must have the lowest floor, including basement, elevated to or
above the level of the regulatory flood protection elevation (RFPE);
(C)
electrical, heating, ventilation, plumbing, and air-conditioning equipment and other
service facilities must be designed and/or located to prevent water from entering or
accumulating within the components during conditions of flooding; and
(D)
for all new construction, major repairs, and substantial improvements, fully enclosed areas
below the lowest floor that are subject to flooding must 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 licensed
professional engineer or architect or must meet or exceed the following minimum criteria:
A minimum of 2 openings having a total net area of not less than one square inch for
every square foot of enclosed area subject to flooding must be provided. The bottom of all
openings must be no higher than one foot above grade. Openings may be equipped with
screens, louvers, or other coverings or devices provided that they permit the automatic
entry and exit of floodwaters.
14-18-4
Any recreational vehicle placed on a site must either:
(A)
be on the site for fewer than 180 consecutive days;
(B)
be fully licensed and ready for highway use, that is, is on its wheels or jacking system, is
attached to the site only by quick-disconnect-type utilities and security devices, and has no
permanently attached additions; or
(C)
meet the permit requirements of Sec. 14-14 and the elevation and anchoring requirements
for mobile homes in subparagraph 14-18-5(A) below.
14-18-5
In all areas of special flood hazard, the following provisions apply for mobile homes:
(A)
no mobile home may be placed in a floodway or non-encroachment area except in a
mobile home park existing prior to January 17, 1983;
(B)
all mobile homes and accessory structures must be anchored to prevent floatation, collapse,
or lateral movement by providing over-the-top and frame ties to ground anchors. Mobile
homes must be anchored in accordance with the requirements in the “State of
North
Carolina Regulations for Manufactured Homes,” as adopted, and subsequently amended,
by the North Carolina Commissioner of Insurance. Any additions to mobile homes must
be similarly anchored;
(C)
for any mobile home to be placed or substantially improved on a site located within a new
mobile home park, within an expansion to an existing mobile home park, within a mobile
home park that has incurred substantial damage as a result of a flood, or outside of a mobile
home park:
(1)
the mobile home must be elevated on a permanent foundation so that its lowest
floor is at or above the base flood elevation;
(2)
the mobile home must be securely anchored to an adequately anchored foundation
system to resist flotation, collapse, and lateral movement;