<div class="chunk-title">Sec. 29-64. - Specific standards.</div>
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               In all areas of special flood hazard where base flood elevation data has been provided
               as set forth in <a href="" data-chunk-id="COOR_CH29FL_ARTIIFLHARE_DIV2FLHARE_S29-61BAESARSPFLHA" class="section-link" data-product-id="11337">section 29-61</a> or <a href="" data-chunk-id="COOR_CH29FL_ARTIIFLHARE_DIV2FLHARE_S29-67PEPR" class="section-link" data-product-id="11337">section 29-67</a>, the following provisions are required:
               
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                  (1)
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                  <span class="ital">Residential construction.</span> New construction or substantial improvement of any residential structure shall have
                  the lowest floor, including basement, elevated to or above base flood elevation.
                  </p>
               		
               
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                  (2)
                  </p>
               		
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                  <span class="ital">Nonresidential construction.</span> New construction or substantial improvement of any commercial, industrial or other
                  nonresidential structure shall either have the lowest floor, including basement, elevated
                  to the level of the base flood elevation or, together with attendant utility and sanitary
                  facilities, be floodproofed so that below the base flood level the structure is watertight
                  with walls substantially impermeable to the passage of water and with structural components
                  having the capability of resisting hydrostatic and hydrodynamic loads and effects
                  of buoyancy. A registered professional engineer or architect shall certify that the
                  standards of this subsection are satisfied. Such certification shall be provided to
                  the official as set forth in <a href="" data-chunk-id="COOR_CH29FL_ARTIIFLHARE_DIV2FLHARE_S29-67PEPR" class="section-link" data-product-id="11337">section 29-67</a>(3).
                  </p>
               		
               
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                  (3)
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                  <span class="ital">Mobile-manufactured homes.</span>
                  </p>
               		
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                  a.
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                  No mobile-manufactured home shall be placed in a floodway or coastal high-hazard area,
                  except in an existing mobile-manufactured home park or existing mobile-manufactured
                  home subdivision.
                  </p>
               		
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                  b.
                  </p>
               		
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                  All mobile-manufactured homes shall be anchored to resist flotation, collapse or lateral
                  movement by providing over-the-top and frame ties to ground anchors. Specific requirements
                  shall be that:
                  </p>
               		
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                  1.
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                  Over-the-top ties be provided at each end of the mobile-manufactured home, with one
                  additional tie per side at an intermediate location on mobile-manufactured homes of
                  less than 50 feet and one additional tie per side for mobile-manufactured homes of
                  50 feet or more;
                  </p>
               		
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                  2.
                  </p>
               		
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                  Frame ties be provided at each corner of the home with four additional ties per side
                  at intermediate points for mobile-manufactured homes less than 50 feet long and one
                  additional tie for mobile-manufactured homes of 50 feet or longer;
                  </p>
               		
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                  3.
                  </p>
               		
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                  All components of the anchoring system be capable of carrying a force of 4,800 pounds;
                  and
                  </p>
               		
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                  4.
                  </p>
               		
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                  Any additions to the mobile-manufactured home be similarly anchored.
                  </p>
               		
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                  c.
                  </p>
               		
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                  New mobile-manufactured home parks and subdivisions; expansions to existing mobile-manufactured
                  home parks and subdivisions; existing mobile-manufactured home parks and subdivisions
                  where the repair, reconstruction or improvement of the streets, utilities and pads
                  equals or exceeds 50 percent of value of the streets, utilities and pads before the
                  repair, reconstruction or improvement has commenced; and mobile-manufactured homes
                  not placed in a mobile-manufactured home park or subdivision require:
                  </p>
               		
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                  1.
                  </p>
               		
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                  That stands or lots are elevated on compacted fill or on pilings so that the lowest
                  floor of the mobile-manufactured home will be at or above the base flood level;
                  </p>
               		
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                  2.
                  </p>
               		
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                  That adequate surface drainage and access for a hauler are provided;
                  </p>
               		
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                  3.
                  </p>
               		
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                  That emergency provisions for hauling operations and the temporary storage of mobile-manufactured
                  homes within an area located outside of the special flood hazard area during flooding
                  be established; and
                  </p>
               		
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                  4.
                  </p>
               		
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                  In the instances of elevation on pilings, lots large enough to permit steps, piling
                  foundations placed in stable soil no more than ten feet apart, and reinforcement provided
                  for pilings more than six feet above the ground level.
                  </p>
               		
               
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                  (4)
                  </p>
               		
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                  <span class="ital">Floodways.</span> Located within areas of special flood hazard established in <a href="" data-chunk-id="COOR_CH29FL_ARTIIFLHARE_DIV2FLHARE_S29-61BAESARSPFLHA" class="section-link" data-product-id="11337">section 29-61</a> are areas designated as floodways. Since the floodway is an extremely hazardous area
                  due to the velocity of floodwaters which carry debris, potential projectiles and erosion
                  potential, the following provisions shall apply:
                  </p>
               		
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                  a.
                  </p>
               		
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                  Encroachments, including fill, new construction, substantial improvements and other
                  developments, shall be prohibited unless certification by a registered professional
                  engineer or architect is provided demonstrating that encroachments shall not result
                  in any increase in flood levels during occurrence of the base flood discharge.
                  </p>
               		
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                  b.
                  </p>
               		
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                  If subsection (4)a. of this section is satisfied, all new construction and substantial
                  improvements shall comply with all applicable flood hazard reduction provisions of
                  this division.
                  </p>
               		
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                  c.
                  </p>
               		
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                  The placement of any mobile-manufactured homes, except in an existing mobile-manufactured
                  home park or subdivision, shall be prohibited.
                  </p>
               		
               
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                  (5)
                  </p>
               		
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                  <span class="ital">Coastal high-hazard areas (V zones).</span> Located within the areas of special flood hazard established in <a href="" data-chunk-id="COOR_CH29FL_ARTIIFLHARE_DIV2FLHARE_S29-61BAESARSPFLHA" class="section-link" data-product-id="11337">section 29-61</a> are areas designated as coastal high-hazard areas. These areas have special flood
                  hazards, associated with high-velocity waters from tidal surge and hurricane wave
                  wash; therefore, the following provisions shall apply:
                  </p>
               		
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                  a.
                  </p>
               		
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                  All buildings or structures shall be located landward of the reach of the mean high
                  tide.
                  </p>
               		
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                  b.
                  </p>
               		
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                  All buildings or structures shall be elevated so that the lowest supporting member
                  is located no lower than the base flood elevation level, with all space below the
                  lowest supporting member open so as not to impede the flow of water, except for breakaway
                  walls as provided for in subsection (5)i. of this section.
                  </p>
               		
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                  c.
                  </p>
               		
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                  All buildings or structures shall be securely anchored on pilings or columns.
                  </p>
               		
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                  d.
                  </p>
               		
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                  Pilings or columns used as structural support shall be designed and anchored so as
                  to withstand all applied loads of the base flood flow.
                  </p>
               		
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                  e.
                  </p>
               		
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                  Compliance with the provisions contained in <a href="" data-chunk-id="COOR_CH29FL_ARTIIFLHARE_DIV2FLHARE_S29-63GEST" class="section-link" data-product-id="11337">section 29-63</a>(4)â€”(6).
                  </p>
               		
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                  f.
                  </p>
               		
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                  Compliance with provisions contained in subsection (5)b.â€”e. of this section shall
                  be certified to by a registered professional engineer or architect, except that a
                  registered land surveyor may be used to certify the lowest floor elevation in relation
                  to the base flood elevation level in accordance with the provisions of this section.
                  </p>
               		
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                  g.
                  </p>
               		
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                  There shall be no alteration of sand dunes or sand dune vegetation which would increase
                  potential flood damage.
                  </p>
               		
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                  h.
                  </p>
               		
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                  Breakaway walls shall be allowed below the base flood elevation provided they are
                  not part of the structural support of the building and are designed so as to break
                  away, under abnormally high tides or wave action, without damage to the structural
                  integrity of the building on which they are to be used.
                  </p>
               		
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                  i.
                  </p>
               		
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                  If breakaway walls are utilized, such enclosed space shall not be used for human habitation.
                  </p>
               		
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                  j.
                  </p>
               		
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                  Prior to construction, plans for any structure that will have breakaway walls must
                  be submitted to the building inspector for approval.
                  </p>
               		
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                  k.
                  </p>
               		
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                  The placement of mobile-manufactured homes, except in an existing mobile-manufactured
                  home park or subdivision, is prohibited.
                  </p>
               		
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                  l.
                  </p>
               		
               <p class="content3">
                  Any alteration, repair, reconstruction or improvement to a structure started after
                  the enactment of this article [April 3, 1978] shall not enclose the space below the
                  lowest floor unless breakaway walls are used as provided for in subsection (5)h. and
                  i. of this section.
                  </p>
               		
               
            <p class="historynote0">
               (Code 1978, Â§ 4-90)
               </p></div>