Use of fibrous mat-faced gypsum board in shaft wall assemblies and improved fire resistant board

摘要

Glass mat-faced gypsum boards having a set core containing gypsum dihydrate and at least a minimum amount of chopped fibers, as well as other optional fire-resistant additives, are provided. The resulting boards obtain superior fire resistance properties over conventional paper- faced boards of like thickness which include a similar amount of chopped glass fibers.