F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
137/4.5
F16L 5/00 (2006.01) A62C 2/06 (2006.01) E04B 1/94 (2006.01) F16L 5/04 (2006.01)
Patent
CA 1278490
FIRE-STOP STACK FITTING AND METHOD OF USING SAME ABSTRACT OF THE DISCLOSUR A fire-stop stack fitting (34) includes a cylindrically-shaped coupling wall (36) having a stop (52) therein for receiving pipes to be coupled from first and second ends. The first end of the cylindrically-shaped coupling wall is affixed to a cavity forming wall (42) defining a cavity which is open in an inwardly radial direction and in a first-end axial direction but which is closed in an outwardly radial direction and in a second-end axial direction. An attachment flange (46) is affixed to the first end of the cavity-forming wall for attaching the fire-stop stack fitting to a concrete form (50). An intumescent material (44) is placed in an intumescent-material cavity (62) and the flange of the fire-stop stack fitting is fastened to a concrete form wall. After concrete (56) has hardened and the form wall (50) is removed, pipes (38, 40) are inserted in opposite ends of the cylindrically-shaped wall (36). The intumescent-material is quickly heated by fire on the first side of the wall since the intumescent-material cavity is open to that side and the intumescent material is free to expand radially into the pipe (40) inserted into the first end of the fitting.
527125
Harbeke Gerold J.
Kirby Eades Gale Baker
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