Architectural · A-3EXCV

Firestopping Sealant and Fire Blocks at Floor Penetration

Materials

Elements

Partitions Floors / Slabs Roof / Floor Openings

About this detail

A floor penetration firestop assembly accommodates an eighteen-inch by six-inch maximum metal cable tray, a three-inch maximum PVC pipe or six-inch maximum steel pipe, and a one-and-a-half-inch maximum cable bundle. Two-inch by eight-inch by five-inch fire blocks are installed flush to the bottom of the floor. Firestopping sealant is applied in all voids between cables, the cable tray, and surrounding annular spaces to the maximum extent possible per plans. The annular space requires a one-inch minimum to seven-inch maximum for cable trays, one-and-a-half-inch minimum to nine-and-a-quarter-inch maximum for pipes, and one-and-three-sixteenth-inch minimum to one-and-a-half-inch maximum for cable bundles, complying with UL listing W-L-8013.

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