A collapsible pan includes a base portion, a plurality of side portions, and a flexible connector for connecting each of the side portions to the base portion along edges thereof. Also disclosed is a fabricated body adapted for insertion of fasteners within a target area comprising a molded body portion, and a receiver plate embedded within the molded body portion in a target area. To insure a tight-fit between each installed barrier and the building units forming the joint space, spreader press-fit tools which, if desired, may serve as fire barriers covers are taught.