ClarkDietrich CT Cavity Shaftwall Studs are rigid high-performance members engineered to maintain shaftwall integrity. CT Studs are designed for use with 1" thick gypsum shaftliner panels. CT Studs are friction-fitted between top and bottom J-Tabbed Track. Gypsum shaftliner panels are inserted into the stud flanges. The flanges provide an airtight friction fit along the length of the panel. Studs are automatically spaced 24" o.c. maximum. The system is finished with fire rated gypsum board to complete and achieve the designated fire rating.