Pass-through firestop apparatus and methods
Assignee3M Innovative Properties Company
InventorBrandon L. Cordts
Life of this patent
Estimating the term…
Abstract
Herein are disclosed are apparatus and methods for forming firestopped through-penetrations in poured concrete partitions. The apparatus and methods use an intumescent firestop ring that can be used in combination with a removable sleeve. The firestop ring is detachably mounted on the outer surface of the sleeve form, near one end of the sleeve. The sleeve is positioned and concrete poured around it. After solidification of the concrete the sleeve can be removed to provide a through-penetration containing the firestop ring, secured to the solidified concrete. The firestop ring may optionally comprise one or more retainers and/or one or more insulating spacers.
Claims22
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.
An apparatus for creating a firestopped through-penetration in a poured, solidified concrete partition, comprising:
- a removable sleeve with an outer surface and a widest end and a narrowest end;
- and,
- an intumescent firestop ring detachably mounted 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;
- wherein the sleeve is configured to create a through-penetration in a poured concrete partition,
- and,
- wherein the sleeve and ring are arranged such that removal of the sleeve from the poured, solidified concrete partition detaches the firestop ring from the sleeve thus providing a through-penetration with an intumescent firestop ring positioned within the through-penetration.
A kit for providing a firestopped through-penetration in a poured, solidified concrete partition, the kit comprising:
- at least one intumescent firestop ring having at least an outer surface and configured to be detachably mounted to the outer surface of a removable elongate sleeve, so that an inner, radially-inward-facing surface of the firestop ring is in contact with the outer surface of the sleeve;
- and,
- at least one retainer configured to be secured to the firestop ring,
- wherein the retainer comprises at least a protruding portion that, when the retainer is secured to the firestop ring, protrudes outward with respect to the outer surface of the firestop ring so as to be able to be at least partially encapsulated by, or at least partially penetrated by, liquid concrete, such that upon solidification of the liquid concrete the retainer and the firestop ring are securely held by the solidified concrete.
Dependencies are inferred from the claim text.