Firestop apparatus for allowing pipe movement

Abstract

A firestop apparatus that allows substantial longitudinal and radial movement of a pipe that extends through an opening in a partition. The firestop includes a thermal insulator assembly that surround the pipe, is positioned to slidably engage with a surface of the partition, and is sized to substantially cover the opening even when the pipe is moved to the edge of the opening. A first seal is interposed between the insulator and the pipe to permit longitudinal movement of the pipe through the insulator. A second seal is interposed between the insulator and the partition to permit radial movement of the pipe and insulator relative to the opening. A securing structure allows radial movement of the insulator relative to the opening while maintaining engagement of the insulator against the side of the partition. The insulator assembly can include an outer plate that engages with the securing structure to provide structure to the insulator during a fire and to resist wear due to relative movement between the insulator and the securing structure. The insulator assembly also can include an inner plate to protect the insulator from damage due to movement against the partition. A slider member may be interposed between the insulator and the first seal to facilitate longitudinal movement of the pipe through the insulator. Also disclosed is a method for sealing a pipe passing through an opening in a partition.