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GYPSUM AND FIRE PROTECTION
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1-HOUR FIRE aggregate units BMS—Building Materials board designation XX building codes ceiling ceramic glazed channels spaced 24 column concrete floor douglas fir fire resistance ratings FIRE RESISTANT FLOOR-CEILING FIRE RESISTANT PARTITIONS fire resistant product Fire Test Reference flamespread furring channels 12 furring channels spaced gauge GYPSUM ASSOCIATION gypsum wallboard attached gypsum wallboard screws gypsum-perlite or vermiculite gypsum-perlite plaster highly fire resistant hour fire resistance identified by ASTM joists lath and plaster long gypsum wallboard metal lath perforated gypsum lath perlite or vermiculite plaster each side plaster N.L.B. presently identified product is acceptable product not presently recognized laboratory report of recognized Report upon request RESISTANT FLOOR-CEILING ASSEMBLIES screws spaced 12 sides N.L.B. slab solid spaced 16 special highly fire steel studs spaced Structures Report studs spaced 24 type X type XX U.L—Underwriters U.L. Design Unpub Unpub.—Based on unpublished unpublished test report vermiculite plaster wallboard screw attached wallboard screws spaced