Lateral Bracing Requirements for Suspended Gypsum-Board Ceilings
Traditionally, suspended gypsum-board ceilings have not been subjected to seismic considerations or engineering. With the new proprietary suspended T-bar drywall grid ceilings and their similarities to suspended T-bar acoustical ceilings, there is the question of whether T-bar drywall grid ceilings must conform to the same seismic considerations as suspended T-bar acoustical ceilings. Although the materials are similar in appearance and installation methods, suspended T-bar drywall grid ceilings are not required to conform to seismic considerations required of suspended T-bar acoustical ceilings.
by Terry Kastner, Executive Director of the Northwest Wall and Ceiling Bureau