Patent ID: 6182407
Filing Date: 2001-02-06
Classification: E04B

Abstract:
A gypsum board/intumescent material fire barrier wall comprising:spaced apart, vertically extending studs; each of the studs having a first side and a second side;a first gypsum board layer and a second gypsum board layer; the first gypsum board layer secured to the first side of the studs and the second gypsum board layer secured to the second side of the studs and forming a fire barrier wall with a wall cavity having a width and a height that is defined, in part, by the studs and opposed major surfaces of the first and second gypsum board layers; the wall cavity having only one gypsum board layer on each side of the studs; andan intumescent material barrier, the intumescent material barrier being coextensive in width and height with the width and height of the wall cavity.