Base layer 1″ x 24″ ToughRock® Shaftliner or DensGlass® Shaftliner panels between 2-1/2″ floor and ceiling J runners with T section of 2-1/2″ steel C-H, C-T or I-studs between panels.
Opposite side: Base layer 1/2″ (12.7 mm) ToughRock® Fireguard C® gypsum board or 1/2″ (12.7 mm) DensArmor Plus® Firegaurd C® gypsum panels applied at right angles to studs with 1″ Type S screws 24″ o.c. and 6″ from floor or ceiling. Face layer 1/2″ (12.7 mm) ToughRock® Fireguard C® gypsum board or 1/2″ (12.7 mm) DensArmor Plus® Fireguard C® gypsum panels applied at right angles to studs with 1-5/8″ Type S screws 12″ o.c. and 3″ from floor and ceiling runners. Joints offset 24″ from base layer joints. (NLB) Sound tested with 1-1/2″ glass fiber insulation friction fit in stud space.
