US 6,182,407 B2Granted

Gypsum board/intumescent material fire barrier wall

AssigneeJohns Manville International, Inc.

InventorsKenneth A. Turpin, Richard A. Versen, Bradley Burdic, Reed H. Larson, Monroe W. Shumate

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Abstract

A gypsum board/intumescent material fire barrier wall includes spaced apart, vertically extending metal or wooden studs with only one layer of gypsum board secured to each side of the studs to form a fire barrier wall with a wall cavity. An intumescent material barrier, that is at least coextensive in width and height with the width and height of the wall cavity, is also included in the fire barrier wall and preferably, the wall cavity contains a fibrous insulation blanket. Preferably, the spaced apart gypsum wall boards, with the intumescent material barrier, provide the fire barrier wall with two hour fire-resistive properties meeting or exceeding ASTM test standard E119 for walls and partitions.

Claims24

Dependent claims

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;
and
an intumescent material barrier, the intumescent material barrier being coextensive in width and height with the width and height of the wall cavity.

4 more elements

Dependencies are inferred from the claim text.