Patent ID: 7950198
Filing Date: 2011-05-31
Classification: E04B

Abstract:
1. A fire-rated vent for use in a wall assembly comprising: a lower vent portion comprising an elongate lower wall, the lower wall having first and second flat outer side portions, first and second angled wall portions inward of the first and second flat outer side portions, respectively, and a central ventilation area having a plurality of lower ventilation holes; an upper vent portion comprising an elongate, flat upper wall having a plurality of upper ventilation holes, the upper vent portion secured to the lower vent portion to define a substantially enclosed space therebetween, wherein the upper ventilation holes and the lower ventilation holes each communicate with the enclosed space; and a strip of fire-retardant material positioned within the enclosed space, the fire-retardant material configured to permit air to move through the enclosed space between the lower ventilation holes and the upper ventilation holes and, in response to elevated heat or fire, expand within the enclosed space and restrict air from moving through the enclosed space between the lower ventilation holes and the upper ventilation holes.