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0 1 S i <br /> - 3 - <br /> standard that communities and others have indicated is <br /> difficult to administer. The revised requirement in the <br /> Final Rule establishes more specific performance standards <br /> and limits enclosures to insect screening, open wood lattice- <br /> , work, or breakaway walls that have a design safe loading <br /> resistance of not less than 10 and no more than 20 pounds <br /> per square foot. Stronger walls must be certified by a <br /> registered professional engineer or architect . This change <br /> is an expansion of the current general performance standard <br /> and does not change the basic requirement that breakaway <br /> walls be intended to collapse under stress without jeopardizing <br /> the structural support of the structure. If your community <br /> is having difficulties administering this general performance <br /> standard, you should make this change at your earlist <br /> convenience. FEMA suggests that you incorporate the language <br /> in the Final Rule into your ordinance intact . In 1976 <br /> FEMA will be publishing a revised version of the Coastal <br /> Construction Manual which will contain specific guidance <br /> on how to design breakaway walls which meet the wall loading <br /> criteria described above . Copies of this design manual <br /> will be obtained by contacting the Natural and Technological <br /> Hazards Division of the FEMA Regional Office servicing your <br /> area (see attached Regional Office Listing) . <br />