Gypsum Board: Nom 5/8 in. thick, 48 in. wide, installed with long
dimension perpendicular to resilient channels with 1-1/8 in. long Type S
screws spaced 12 in. OC and
located a min of 1/2 in. from side joints and 3 in. from the end joints. At
end joints, two resilient channels are used, extending a min of 6 in. beyond
both ends of the joint. When
insulation, Item 3 or 3A, is draped over the resilient channel/gypsum
wallboard ceiling membrane, screws shall be installed at 8 in. OC.
NATIONAL GYPSUM CO ù Types
FSW-G, FSW-C.