Architectural · A-KR7VR

Pipe Penetration @ Rated Assy

Materials

Concrete Masonry / CMU Reinforced Concrete Steel

Elements

Floors / Slabs Reinforcing Roof / Floor Openings Walls

About this detail

Multiple electrical nonmetallic conduits penetrate a four-and-a-half-inch minimum reinforced concrete wall or six-inch minimum hollow core precast concrete floor with a maximum six-inch opening. The annular space contains a firestop system fill, void, or cavity material sealant flush with both surfaces, complemented by a three-sixteenths-inch by one-and-three-quarters-inch intumescent wrap strip in two layers. A twenty-eight gauge galvanized steel collar wraps the assembly, anchored to the concrete surface. The installation achieves a three-hour F-rating and two-hour T-rating per system C-AJ-2402.

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