Electrical · E-3ZJQZ

Firestop Penetration Detail at Gypsum Wall Board

Materials

Steel Timber / Wood Metal (misc.)Gypsum / Drywall

Elements

About this detail

A through-penetration firestop assembly for a metal pipe or conduit passes through a one-to-two-hour fire-rated gypsum wall board partition framed with steel or wood studs. The annular space around the penetrating item receives one or more wraps of intemuescent wrap strip, depending on the gap size, secured with foil tape or sixteen gauge steel tie wire as needed. The wrap strip slides into the opening with a maximum three-quarter inch exposed wrap beyond the wall surface. Edges and seams are sealed with a one-quarter inch minimum bead of intumescent putty applied on both sides of the wall. Installation complies with ASTM-E814 (UL 1479) fire test requirements and UL through-penetration firestop system number WL 1002.

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