Superior 8" Chimney Firestop Thimble (Use when offsetting through a joist) - FST30

The Superior 8" Chimney Firestop Thimble (Use when offsetting through a joist) - FST30 (Use when offsetting through a joist) - FST30 is an innovative solution for offsetting through joists. It provides a secure firestop seal around penetrations in combustible walls and floors while allowing for easy installation. The thimble is made from galvanized steel and is designed to be installed between two layers of drywall or other combustible material.

It features an adjustable collar to ensure the correct fit for most joists in residential, commercial, or industrial applications. The Superior Firestop Thimble is UL-listed and tested to meet ASTM E-814 and UL-2079 standards.

It is designed to resist fire and heat up to 2 hours and can be used with a variety of penetration types, including electrical boxes, pipes, and conduits.