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Keywords from Image Description:
Conduit busduct. Topside of firestop with penetrants consisting of electrical conduit on the left and bus duct on the right The firestop consists of firestop mortar on top and rockwool on the bottom for hour fireresistance rating Own Achim Hering Electrical conduit Cement Firestops Operable firestops Firestop mortar Bus ducts BIO