FM Approval Wall Factory Mutual (FM) Approval for Class 1 Fire Rating – Class 4880 ATB-0005 Factory Mutual (FM) Approval for Class 1 Exterior Wall Systems – Class 4881 ETB-0008-R1 Factory Mutual (FM) Approval for Class 1 Exterior Wall Systems – Class 4881 (back-fastened) ETB-0013-R1 Factory Mutual 4881 (BAC-12) ETB-0016-RI Factory Mutual 4881 (BAC-08) ETB-0017-R1 Roof Factory Mutual 4471 ETB-0015