Patent ID: 8146305
Filing Date: 2012-04-03
Classification: E04G,F16L

Abstract:
1. A method for creating a firestopped through-penetration in a poured, solidified concrete partition, comprising: providing a removable sleeve with an outer surface and a widest end and a narrowest end; detachably mounting an intumescent firestop ring on the outer surface of the sleeve, adjacent the widest end of the sleeve, so that an inner, radially-inward-facing surface of the firestop ring is in contact with the outer surface of the sleeve; positioning the sleeve on a form; pouring liquid concrete around the sleeve and firestop ring; solidifying the concrete such that the firestop ring is securely held by the concrete; and, removing the sleeve from the solidified concrete to provide a through-penetration at least partially defined by the shape of the sleeve, wherein removing the sleeve from the solidified concrete causes the firestop ring to be detached from the sleeve and to remain in place in the through-penetration, securely held by the solidified concrete.