Architectural · A-N93F7

Fire Rated Trimless Frame Door Head and Sill

Materials

Concrete Steel Timber / Wood Masonry / CMU Stone Glass / Glazing Metal (misc.)Gypsum / Drywall

Elements

About this detail

A fire-rated wood door is set within a twenty-gauge ninety-minute fire-rated steel trimless frame, with edges taped and mudded into the surrounding five-eighths-inch thick Type X gypsum wallboard partition. The head detail incorporates a box header coordinated with the partition type, continuous acoustical sealant with backer rod, compressible neoprene filler, and an integral smoke seal with intumescent tape. The sill detail features a heavy-duty automatic door bottom sealing against a solid black stone smooth threshold with a double bevel, maintaining a one-quarter-inch maximum clearance over the finished floor.

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