3/8" (10mm) Type S screws, and with Type W screws 1-1/4" (32 mm) long to wood framing or with Type S screws 3/8" (9.5 mm) long to steel studs through holes provided in the clip. Clips spaced a max 4 of 10' (3050 mm) o.c. vertically between wood or steel framing and ...
12.7 mm (1/2") CertainTeed® Type C gypsum board attached to the steel framing with 25.4 mm (1") Type S drywall screws spaced 300 mm (12") o.c. Accessible attic areas typically use this alternate method. Non-accessible attic areas do not require the 150 mm (6") wide gypsum board...