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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />I <br /> <br />I <br /> <br />.1 <br /> <br />I <br />I <br /> <br />L- <br /> <br />I <br /> <br />r- <br /> <br />I <br /> <br />of <br />I- <br /> <br />de <br /> <br />I <br /> <br />560.3 <br /> <br />.nd <br />Ii <br /> <br />the officla.l desllrna.ted by the commu- <br />nity under 1 69.22(&){9)(1II); <br />(6) Require, for &11 new construction <br />a.nd substantla.l Improvements. that <br />fUlly enclosed a.reas below the lowest <br />floor thAt a.re usa.ble solely for pe.rklnlr <br />of vehicles, building a.ccess or storage <br />In a.n a.rea. other tha.n a basement a.nd <br />which a.re subject to flooding shall be <br />designed to a.utoma.tlcally equa.llze hy- <br />drostatic flood forces on exterior wa.lls <br />by a.llowing for the entry a.nd exit of <br />floodwa.ters. Designs for meeting this <br />requirement must either be certified <br />by a. reglstered professiona.l englneer or <br />a.rchltect or meet or exceed the follow- <br />ing minimum criteria.: A minimum of <br />two openings having a. tota.1 net &rea. of <br />not lees tha.n one square Inch for every <br />squa.re foot of enclosed a.rea subject to <br />flooding sha.l1 be provided. The bottom <br />of a.ll openings shall be no higher tha.n <br />one foot a.bove grade. Openings may be <br />equipped with screens, louvers. va.lves, <br />or other coverings or devices provided <br />that they pennlt the automatic entry <br />a.nd exit of floodwaters. <br />(6) Require that manufactured homes <br />that a.re placed or substantially im- <br />proved within Zones A 1-30, AH. a.nd AE <br />on the community's FIRM on sites <br />(i) Outside of a manufactured home <br />pa.rk or subdivision. <br />(Ii) In a new manufactured home <br />pa.rk or subdivision. <br />(Ill) In a.n expansion to an existing <br />manufactured home pa.rk or subdivi- <br />sion. or <br />(iv) In a.n eXisting manufactured <br />home park or subdivision on which a. <br />manufactured home has incurred "sub- <br />stantial damage" as the result of a <br />flood. be elevated on a pennanent foun- <br />dation such that the lowest floor of the <br />manufactured home is elevated to or <br />above the base flood elevation a.nd be <br />securely anchored to an &dequa.tely a.n- <br />chored founda.tlon system to resist <br />floatation collapse and lateral move- <br />ment. <br />(7) Require within any AO zone on <br />the community's FIRM tha.t all new <br />construction and substantial improve- <br />ments of residential structures have <br />the lowest floor (inclUding basement) <br />eleva.ted a.bove the highest &djacent <br />gra.de a.t least as high as the depth <br />number specified in feet on the commu- <br /> <br />a.c- <br /> <br />J= <br /> <br />ec- <br /> <br />I ~; <br /> <br />are <br />Ih <br /> <br />I <br /> <br />... CFR Ch. I (10+96 Ec:ItIon) <br /> <br />nlt)"s FIRM (a.t least two feet It no <br />depth number Is speclned); <br />(8) Require within a.ny AO lOne on <br />the community's FIRM tha.t a.ll new <br />construction a.nd substantla.l Improve- <br />mente of nonresldentla.l structures (I) <br />have the lowest floor (Includlnr base- <br />ment) eleva.ted a.bove the hlrhest a.dj&- <br />cent grade a.t least u high a.s the depth <br />number specified In feet on the commu- <br />nity's FIRM (a.t leut two feet If no <br />depth number Is specified), or (II) to- <br />gether with a.ttenda.nt utility a.nd aa.nl- <br />tary facilities be completely <br />flood proofed to tha.t level to meet the <br />flood proofing standa.rd specified In <br />f 6O.3(c)(3)(1I); <br />(9) Require within a.ny A99 zones on & <br />community's FIRM the st&nda.rds of <br />para.gra.phs (a){l) through (a)(4){i) a.nd <br />(b){5) through (b)(9) of this section; <br />(lO) Require until a. regula.tory <br />floodwa.y is designated, tha.t no new <br />construction, substantial Improve- <br />ments. or other development (including <br />fill) shall be pennitted within Zones <br />Al-30 and AE on the community's <br />FIRM, unless it is demonstra.ted tha.t <br />the cumulative effect of the proposed <br />development. when combined with all <br />other existing a.nd anticipated develop- <br />ment. will not increase the water sur- <br />face elevation of the base flood more <br />than one foot at any point within the <br />community. <br />(11) Require within Zones AH a.nd AO, <br />adequate drainage paths a.round struc- <br />tures on slopes. to gUide floodwaters <br />around and away from proposed struc- <br />tures. <br />(l2) Require that manufactured <br />homes to be placed or substantially Im- <br />proved on sites in an existing ma.nufa.c- <br />tured home pa.rk or subdivision within <br />Zones A-l-30, AH. and AE on the com- <br />munity's FIRM that are not subject to <br />the provisions of paragraph (c)(S) of <br />this section be elevated so tha.t either <br />(i) The lowest floor of the manufac- <br />tured home is at or above the base <br />flood elevation, or <br />(Ii) The manufactured home chassis <br />Is supported by reinforced piers or <br />other foundation elements of at leut <br />equivalent strength tha.t are no less <br />than 36 inches in height above gr&de <br />and be securely anchored to a.n &de- <br />quately anchored founda.t1on system to <br /> <br />238 <br />