Invention Grant
US08191330B1 Firestop drain assembly 失效
防火排水装置

Firestop drain assembly
Abstract:
A firestop drain assembly for mounting in a partition to prevent fire on one side of the partition from moving through the firestop drain assembly to the other side of the partition. The firestop drain assembly can achieve an F-rating and a T-rating of at least one (1) hour.
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