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6/14/23,3:07 PM Chapter 7: Fire and Smoke Protection Features,2021 Washington State Building Code I UpCodes 2.Combination of 2-1.1 4"solid brick and 4"tile(not less than 40 percent solid). - 8 - - clay brick and load- bearing hollow clay tile 2-1.2 4"solid brick and 8"tile(not less than 40 percent solid). 12 - - - 3-1.1f'g Expanded slag or pumice. 4.7 4.0 3.2 2.1 3.Concrete masonry 3-1.2f•g Expanded clay,shale or slate. 5.1 4.4 3.6 2.6 units 3-1.3f Limestone,cinders or air-cooled slag. 5.9 5.0 4.0 2.7 3-1.4f,g Calcareous or siliceous gravel. 6.2 5.3 4.2 2.8 Siliceous aggregate concrete. 7.0 6.2 5.0 3.5 Carbonate aggregate concrete. 6.6 5.7 4.6 3.2 4.Solid concrete'' 4-1.1 Sand-lightweight concrete. 5.4 4.6 3.8 2.7 Lightweight concrete. 5.1 4.4 3.6 2.5 One 2"unit cored 15 percent maximum and one 4"unit cored 25 percent maximum with 3/4'mortar- 3 5 1.1 -filled collar joint.Unit positions reversed in alternate courses. 6 /g One 2"unit cored 15 percent maximum and one 4"unit cored 40 percent maximum with 3/4'mortar- 5-1.2 filled collar joint.Unit positions side with 3/4'gypsum plaster.Two wythes tied together every fourth - 63/4 - - course with No.22 gage corrugated metal ties. 5-1.3 One unit with three cells in wall thickness,cored 29 percent maximum. - - 6 - 5.Glazed or unglazed facing tile,nonload One 2"unit cored 22 percent maximum and one 4"unit cored 41 percent maximum with /4 mortar- bearing 5-1.4 filled collar joint.Two wythes tied together every third course with 0.030"(No.22 galvanized sheet steel - - 6 - gage)corrugated metal ties. 5-1.5 One 4"unit cored 25 percent maximum with 3/4'gypsum plaster on one side. - - 43/4 - 5-1.6 One 4"unit with two cells in wall thickness,cored 22 percent maximum. - - - 4 5-1.7 One 4"unit cored 30 percent maximum with 3/4"vermiculite gypsum plaster on one side. - - 41/2 - 5-1.8 One 4"unit cored 39 percent maximum with 3/4"gypsum plaster on one side. - - - 41/2 6.Solid gypsum 3/4'by 0.055"(No. 16 carbon sheet steel gage)vertical cold-rolled channels, 16"on center with 2.6-pound plaster 6-1.1 flat metal lath applied to one face and tied with 0.049"(No.18 B.W.gage)wire at 6"spacing.Gypsum - - - 2d plaster each side mixed 1:2 by weight,gypsum to sand aggregate. 6-1.2 3/4"by 0.05"(No.16 carbon sheet steel gage)cold-rolled channels 16"on center with metal lath applied to - - 21/2d 2d one face and tied with 0.049"(No. 18 B.W.gage)wire at 6"spacing.Perlite or vermiculite gypsum plaster https://up.codes/viewer-export/washington/wa-building-code-2021/chapter/7/fire-and-smoke-protection-features#721.1 ci/ 7I28