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Table 323.6.1 <br /> WINDBORNE DEBRIS PROTECTION AND CYCLIC PRESSURE <br /> CRITERIA FOR RESIDENTIAL SAFE ROOMS <br /> Enclosure Wall <br /> ASTM E Ceiling, and Floor <br /> 1996 Debris Missile Debris Cyclic Air Pressure <br /> Missile Impact Testing- maximum <br /> Level Size Speed inward and <br /> Rating maximum outward <br /> pressures <br /> 2 x 4 weighing 9.0 <br /> lb. +/- 0.25 lb., 50 ft./sec. 35 psf inward <br /> D and with min. or at least 45 psf outward <br /> length 8 ft. 34 mph <br /> +/- 4-inch <br /> R323.6.2 Approved debris impact resistant wall assemblies. The <br /> following methods of wall assembly construction shall be deemed to <br /> comply with Section R323.6.2: <br /> 1. 3/4-inch plywood on wood studs spaced at 16 inches on-center <br /> with#8 X 3 inch wood screws at 6 inches on-center. <br /> 2. 3/4-inch plywood attached to double studs spaced at 16 inches on- <br /> center with #8 X 3 inch wood screws at 6 inches on-center. <br /> _ 3. 8-1/4 inch cementitious lap siding over 22 gage sheet metal <br /> attached to 3505-162-33 studs spaced at 24 inches on-center. <br /> 4. 8-1/4 inch cementitious lap siding attached to 3505-162-33 studs <br /> spaced at 24 inches on-center studs with interior 3/4-inch interior <br /> plywood sheathing. <br /> 5. 8-1/4 inch cementitious lap siding attached to 3505-162-33 studs <br /> spaced at 24 inches on-center with 1/2-inch interior 22 gage sheet <br /> metal composite gypsum wallboard. <br /> 6. 8-1/4 inch cementitious lap siding attached to 2 inch X 4 inch <br /> wood studs spaced at 16 inches on-center with 1/2-inch interior 22 <br /> gage sheet metal composite gypsum wallboard. <br /> 7. 8-1/4 inch cementitious lap siding attached to 2 inch X 4 inch <br /> wood studs spaced at 16 inches on-center with 22 gage sheet <br /> metal and 1/2-inch interior gypsum wallboard. <br /> 8. Cementitious lap siding attached to 5/8-inch structural plywood <br /> on 2 inch X 4 inch wood studs spaced at 16 inches on-center. <br /> 9. Cementitious-panel siding attached to 5/8-inch structural <br /> plywood on 2 inch X 4 inch or 362S-137-43 steel studs spaced at <br /> 16 inches on-center. <br /> 10. EFS with 1/2-inch dens-glass gold exterior sheathing on 362S- <br /> 137-43 steel studs spaced at 16 inches on-center and 1/2-inch <br /> interior gypsum wallboard. <br /> 11. 24 gage steel sheet (50 ksi) on girts. <br /> 12. Concrete with a thickness of 4 inches with reinforcing. <br /> 29 <br />