Extendable sleeve for poured concrete deck

摘要

A tubular passage for poured concrete decks has an intumescent tube held in a two-part, clamshell base by a bottom clip. A first tube engages the base's top to clamp a funnel shaped, diaphragm seal to the base. The first tube has spaced, radially extending, parallel ridges at predetermined distances from the base. Longitudinal channels separate the ridges. An extension tube has inward extending lugs passing along the channels to engage various ridges when rotated to fix the passage length. The extension engages the base bottom for corrugated deck supports. A cap with repositionable, locating filaments closes either tube.

主权项

1. A kit for forming a tubular passage along a longitudinal axis for passage of a pipe through a poured concrete deck, comprising:
a base assembly having a base formed of two opposing housing portions fastened together to form a cylindrical sidewall portion containing a tubular cylinder of intumescent material adjacent the cylindrical sidewall portion, the tubular cylinder of intumescent material encircling the longitudinal axis; a flexible diaphragm seal having a central opening selected to seal against a range of pipe diameters during use, the seal having a funnel portion between an outer periphery and the central opening with a curved sidewall on the funnel portion encircling the axis when the seal is in an undeformed condition, the diaphragm having a flange depending from and encircling the periphery with the flange extending along the axis; and a first cylindrical tube configured to fasten to a top of the base assembly during use and encircle the longitudinal axis during use, the first tube and base being configured to clamp a periphery of the flexible diaphragm between them sufficiently to form a fluid tight seal.