Architectural · A-YNQB6

Two-Hour Rated Partition to Curtain Wall Blind Mullion

Materials

Elements

Beams Walls Partitions Windows Curtain Walls Insulation

About this detail

This plan detail shows the junction where a two-hour rated partition meets an aluminum curtain wall blind mullion. A pre-finished aluminum window frame system with insulated glazing and spandrel glass forms the exterior facade. Mineral wool safing with a minimum eight pounds per cubic foot density and two-inch thickness wraps around the mullion, backed by firestop joint spray and minimum two-inch R-nineteen rigid insulation. A one-quarter-inch thick black two-way tape and an aluminum breakshape with a snap-on finish tie the curtain wall mullion to the rated wall finish, extending one inch beyond the safing. Window film spans from the mullion to the breakshape, and a caulking joint seals the interior transition against a one-by-one angle.

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