Patent ID: 7152385

Claim:
A device for making a barrier against spread of fire across an opening at the top of an interior wall of a building, comprising, in combination; (i) a longitudinally extending track having a generally elongate body and an “H”-shaped cross-sectional profile, said track further having an upwardly extending pair of flanges and a downwardly extending pair of flanges defining, respectively, upper and lower longitudinally extending channels, said track further having a longitudinally extending separating wall member separating said upper and lower channels, said wall member having a plurality of openings located periodically along its longitudinal extension; and (ii) a molding barrier bag operative to be filled with a firestop material and positioned in and along the longitudinal extent of said upper channel, said bag having crinkles or pleats operative as compartments to permit expansion of said bag when filled with firestop material and further having a plurality of fitments extending through said openings of said wall member operative to admit firestop material to the interior of said bag.