Patent ID: 8629348

Claim:
A method of providing a fire barrier in a building, the steps comprising: providing a first layer having a first surface, a second surface, and a first lumen therebetween; providing a second layer spaced apart from the first layer having a first surface and a second surface; providing a first structural member disposed between the first layer and the second layer, said first structural layer positioned generally adjacent the first lumen of the first layer and joined to the second surface of the first layer; providing a second structural member disposed between the first layer and the second layer, said first structural layer positioned generally adjacent the first lumen of the first layer and joined to second surface of the first layer; providing a metal wall member being continuously fire resistant, the wall member defining a cavity and an opening thereto, wherein the fire resistant metal wall is adapted to substantially seal the lumen of the first layer against the passage of heated gas the fire resistant metal wall not comprising a layer proximate the wall made from a material selected from the group consisting of intumescent materials and cementitious material; providing a flange at least partially surrounding the opening defined by the wall member and attached proximate the join between the first layer and the first structural member and proximate the join between the first layer and the second structural member; attaching the flange proximate the join between the first layer and the first structural member and proximate the join between the first layer and the second structural member, wherein the first lumen of the first layer lies everywhere within the opening defined by the continuous metal wall member; and disposing a light fixture in the lumen of the first layer and extending into the cavity defined by the continuous fire resistant metal wall member.