Keywords: Mortar reentry.jpg Fire test preparation for re-entry of firestop mortar seal with a cable tray The holes were made with a jackhammer ergo the spalling at the bottom of the mortar slab Own 2007-06-22 Achim Hering Firestops Fire testing Cable trays Firestop mortar Cement Firestops being installed 3M Fire Barrier Mortar CAJ 8073 |