5/8” ToughRock® Fireguard X® Products or DensArmor Plus® Fireguard® gypsum panels applied perpendicular to resilient channels 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 8” (203 mm) o.c. Gypsum panels end joints located over continuous channels and attached to additional pieces of channel 54” (1372 mm) long located midway between continuous channels at end joints. Resilient channels 24” (610 mm) o.c. suspended from 2-1/2” (64 mm) precast reinforced concrete joists 35” (89 mm) o.c. with 21-gauge (37 mils) galvanized steel hanger straps fastened to sides of joists. Joist leg depth, 10” (254 mm).
