Architectural · A-H3R9Z

Fire Damper Penetration at Rated Gypsum Board Partition

Materials

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

About this detail

Metal ductwork passes through a rated gypsum board partition framed with double metal studs and perimeter framing. A fire damper sleeve and unit are installed within the opening, surrounded by an open gap maintained per SMACNA standards. UL complying perimeter metal support angles are secured to both sides of the partition, overlapping the opening by a minimum of one inch and attached as required by the rated assembly. Fire-rated sealant is applied at the perimeter joints to maintain the maximum two-hour fire rating in accordance with UL W-L-7008 or equivalent.

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