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b� � m <br />7 H N <br />a <br />� N <br />o �m o <br />ro ai r�. <br />� H � <br />"°R <br />�• �y <br />� y 2 <br />� M H <br />N <br />G N <br />�x � [rE <br />H O tn <br />� , r, ,. �. <br />�-- Alternate Methods o1.;onstruction for Spray Booths <br />The approval of altemate methods of construction for spray booths is a confusing subject. First, <br />many people aslc if it is equivalent to use wall asscmblies consisting of inetal studs and gypsum boud <br />or masonry wall for a sprny booth. These assemblies meet the noncombustibility requirement and aze <br />certainly suucturally sound. However, there are problems with the surfaces of gypsum board and <br />masonry because such surfaces aze porous and may collect overspray.'Though the porosity could be <br />overcome by applying a sealant to the surface, the problem of cleaning overspray cannot be solved '' <br />unless a smooth, nonporous and noncombustible liner, such as light metal sheeting, is installed on <br />the interior. Where such a liner is instatled, metal stud and gypsum boazd assemblies or masonry � <br />walls aze acceptabfe. . <br />The chief may also approve other alternatives, such as specially designed films and nonco�m$usti- <br />ble papers which can be changed when residue accumulates. . ' <br />METALJOISTS <br />OUTSIDE <br />�k" MINIMUM TYPE "X" <br />METAL GYPSUM BOARD— <br />STUDS BOTH SIDES OF <br />METAL FRAMING <br />�F <br />1� ' <br />NOTE: LIGHT FIXTURES <br />MUST BE CLASS I, <br />DIVISION 1 OCCUPANCY— <br />EXPLOSION PROOF <br />OUTSIDE <br />INSIDE <br />SPRAY BOOTH <br />SMOOTH,NUNPOROUS <br />AND NONCOMBUSTIBLE <br />LINER, TYPICAL AT INSIDE <br />WALLS AND CEILING <br />SECTION <br />16 <br />MASONRY <br />WALL <br />m <br />