5/8” (15.9 mm) ToughRock® Fireguard X® or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum panels applied vertically to a double row of 1-5/8” (41 mm) (15 mils) steel studs 24” (610 mm) o.c. and not less than 1” (25 mm) apart with 1” (25 mm) Type S drywall screws 8” (203 mm) o.c. at edges and top and bottom runners, 12” (305 mm) o.c. in field. Stagger joints 24” (610 mm) opposite side. 5/8” (15.9 mm) gypsum board pieces 12” (305 mm) long x 4-1/2” (114 mm) wide located at 1/3 points used as cross braces fastened to stud pairs with three 1” (25 mm) Type S drywall screws at each end of brace. Optional (15 mils), stud or runner pieces not less than 4-1/2” (114 mm) long may be used as cross braces and attached with two No. 8 x 1/2” (13 mm) self-drilling steel screws at each end. Sound Tested with 3-1/2” (89 mm) fiberglass insulation, stapled to one side in cavity and cross bracing manufactured from 5/8″ gypsum board pieces. Non-Load Bearing
