Abstract: A fire-rated light kit for a fire-resistant partition includes a track for holding a window pane in an aperture of the partition. The track includes a channel for capturing an edge of the window pane, and a flange. A first intumescent material is positioned under the track to seal between the track and the partition. A second intumescent layer is positioned on top of the track. A flammable molding material can be positioned over the flange of the track. In the event of heat or flame, the second intumescent layer expands and pushes the flammable trim away from the glass and/or partition.

Abstract: A construction panel including at least first, second, and third oriented stranded board (OSB) materials in sheet form adhesively glued together in a back to back arrangement. The construction panel can be used as a wood door core. A wood veneer covering or other exterior covering can be placed over the core as desired. The door construction may include rails along the top and the bottom of the core, and stiles along the side of the core. A method of assembling a construction panel wherein three panels of oriented stranded board (OSB) material in sheet form are glued together in a back to back arrangement. In one method, the two outermost faces of the panel are sanded or otherwise processed to smooth out imperfections on the front and rear faces.

Abstract: A fire-rated light kit for a fire-resistant partition includes a track for holding a window pane in an aperture of the partition. The track includes a channel for capturing an edge of the window pane, and a flange. A first intumescent material is positioned under the track to seal between the track and the partition. A second intumescent layer is positioned on top of the track. A flammable molding material can be positioned over the flange of the track. In the event of heat or flame, the second intumescent layer expands and pushes the flammable trim away from the glass and/or partition.