Architectural · A-8H732

Non-Metallic Pipe Penetration at Rated Framed Wall

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A non-metallic pipe penetration passes through a one- or two-hour rated framed partition per plan, complying with UL System No. W-L-2185. The penetrant consists of a maximum eight-inch diameter PVC or CPVC pipe, or a maximum six-inch diameter PVC conduit, rigidly supported on both sides of the wall. A galvanized steel sleeve lined with intumescent material wraps around the penetrant, secured by minimum one-half-inch wide stainless steel hose clamps or three-quarter-inch wide glass cloth electrical tape wrapped twice and spaced maximum two inches on center. The annular space between the pipe and the opening edge varies by pipe diameter from one-quarter-inch to one-and-one-eighth inches. Fire sealant is applied into the annular space to a minimum depth of five-eighths of an inch, flush with both wall surfaces, with a minimum three-eighth-inch bead added between the wall and sleeve.

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