Architectural · A-JPQSB

Two-Hour Rated Partition and Spandrel Mullion Connection

Materials

Elements

Beams Walls Partitions Windows Curtain Walls Roofs Floors / Slabs Insulation

About this detail

A two-hour rated interior partition wall intersects a pre-finished aluminum window frame system and spandrel glass curtain wall. Mineral wool safing with a minimum eight pounds per cubic foot density and two-inch thickness wraps around the mullion, sealed with firestop joint spray. An aluminum breakshape with snap-on connection attaches to the curtain wall mullion and extends one inch beyond the fire safing, complemented by a one-by-one inch angle and caulking at the interior edge. A quarter-inch thick black two-way tape is applied at the interface, and window film spans from the mullion to the breakshape. Two-inch minimum R-nineteen rigid insulation lines the adjacent concrete slab edge at levels three through six and roof.

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