Keywords: Cbc 3 of 3.jpg Canadian Broadcasting Corporation Toronto Ontario Canada Electrical Closet firestop During the original construction AD firebarrier mortar was installed at insufficient depth in this cable tray penetration Re-entries were not subject to a routine re-sealing but did reveal the generically insufficient thickness Own 2007-08-27 Achim Hering Firestops Cement Cable trays Firestop mortar Re-entered but not resealed firestops Certified firestop materials - incorrect installation Building code violations AD Fire Barrier Mortar |