Wrap Strip Tuck-In Apparatus

Abstract

A firestopping apparatus having an unexpanded configuration and an expanded configuration. The apparatus includes first and second intumescent strips connected with a fire-resistant material layer. Each intumescent strip has opposed end surfaces defining the length of the strips and the apparatus, opposed inner and outer edge surfaces defining the width of the strips and the apparatus, and opposed inner and outer core surfaces defining the thickness of the strips and the apparatus. The fire-resistant material layer has first and second opposed portions overlayed and affixed to at least one of the inner edge surfaces, outer core surfaces and outer edge surfaces of each strip, and has a central bridging portion fixed to and extending between the first and second strips to connect the strips in adjustable spaced relation relative to one another. The strips are arranged with the inner core surfaces abutting one another in the unexpanded configuration with the outer core surfaces defining the apparatus thickness extending therebetween. The strips thermally react and expand in thickness to the expanded configuration when exposed to elevated temperature caused by a fire.

Dependencies are inferred from the claim text.