Non-rated interior partition assembly featuring steel studs faced with one layer of 5/8-inch gypsum board on the symbol side. A sound attenuation blanket is installed in the cavity where scheduled, alongside metal flat strap lateral bracing as required. A comprehensive schedule details various stud sizes, basic partition thicknesses, and corresponding STC ratings for partitions extending to the structure above, six inches above the ceiling, or to the finished ceiling.
5/8" GYP BD, 1 LAYER ON SYMBOL SIDE D NON-RATED WITH GYP BD TO STRUCTURE ABOVE NON-RATED WITH STUDS & GYP BD TO FINISHED CEILING STUD SIZE BASIC PARTITION THICKNESS ACOUSTICAL INSULATION D1_ STC 29 2 1/2" 3 1/8" - 2 1/2" 3 1/8" YES D2_ STC 27 3 5/8" 4 1/4" - D3_ STC 30 3 5/8" 4 1/4" D4_ STC 27 4" 4 5/8" - D5_ STC 30 4" 4 5/8" D6_ STC 27 6" 6 5/8" - D7_ STC 31 6" 6 5/8" D8_ STC 27 26 1 1/2" 2 1/8" D9_ STC NON-RATED WITH GYP BD TO 6" ABOVE CEILING BASIC PARTITION THICKNESS METAL FLAT STRAP LATERAL BRACING AS REQUIRED YES YES YES YES STEEL STUD SOUND ATTENUATION BLANKET WHERE SCHEDULED D11 D12 D13 D21 D22 D23 D31 D32 D33 D41 D42 D43 D51 D52 D53 D61 D62 D63 D71 D72 D73 D81 D82 D83 D91 D92 D93
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