Architectural · A-GBXYD

Transition at Rated Soffit and Exterior Wall

Materials

Timber / Wood Metal (misc.)Gypsum / Drywall

Elements

About this detail

Transition between a one-hour fire-rated exterior wall assembly and a two-hour fire-rated soffit enclosure. The exterior wall features metal stud framing, exterior sheathing, an air and water barrier, drainage mat, and Portland cement plaster, finished on the interior with Type X gypsum board. The soffit enclosure incorporates CH studs beyond, gypsum liner panels, and Type X gypsum board, with a J-bead terminating the plaster edge at the intersection. Sheet metal flashing with sealant and backer rod is provided at the exterior junction. The line of a mechanical duct is located beyond within the ceiling space.

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