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R323.6 Design for dead, live, wind, rain, and impact loads. <br /> R323.6.1 Structural integrity criteria. <br /> 1. The residential safe room shall be built with a complete <br /> structural system and a complete load path for vertical and <br /> lateral loads caused by gravity and wind. <br /> 2. The building that the residential safe room is in shall be assumed <br /> to be destroyed by the storm and shall not be taken as offering <br /> any protective shielding to the safe room enclosure. <br /> 3. The ceiling structure and wall shall be capable of supporting a <br /> superimposed debris load of the full weight of any building floors <br /> and roof above, but not less than 125 psf. <br /> 4. The residential safe room enclosure shall be capable of <br /> simultaneously resisting lateral and uplift wind pressures <br /> corresponding to a 145 mph 3-second peak gust ultimate design <br /> wind speed, determined in accordance with ASCE — 7, Minimum <br /> Design Loads for Buildings and Other Structures. The site <br /> exposure factor shall be based on exposure C or the exposure <br /> shown in Figure R301.2.1.4(a), whichever is the greater. The <br /> values for the gust factor and the directionality factor shall be <br /> taken as 0.85. Topographic wind amplification caused by <br /> mountainous terrain shall be considered in accordance with the <br /> building code. Internal pressure shall be determined in <br /> accordance with ASCE— 7. <br /> 5. The residential safe room shall be anchored to a foundation <br /> system capable of resisting the above loading conditions. <br /> R323.6.2 Windborne debris impact protection of building <br /> enclosure elements. The entire enclosure of the safe room, including <br /> all walls, ceilings, and openings, fixed or operable windows, and all <br /> entry doors into the safe room, shall meet or exceed Level D <br /> requirements of ASTM E 1996 (Table 323.6.1), or be an approved <br /> assembly listed in Section 323.6.4. Any wall or ceiling penetration <br /> greater than 4 square inches shall be considered an opening. <br /> Exception: Electrical outlet boxes and interior lighting switches not <br /> penetrating more than 2.5-inches into the interior wall surface and a <br /> plumbing piping or conduit not greater than 1.5-inch in diameter shall <br /> be exempted from this requirement. <br /> p q <br /> R323.6.3 Cyclic pressure loading of glazing and protective <br /> systems. Impact protective systems shall meet the ASTM E 1996 <br /> cyclic pressure requirement for the loading given in Table 323.6.1. <br /> 28 <br />