Abstract: A cold forming process includes mechanically joining two strips of metal. The process entails two roll passes. The first pass lances and forms short locking areas through both strips of metal. The second pass compresses and flairs the metal at these areas to complete a mechanical interlock. This method can provide a row of closely spaced fastenings at high speed. It is applicable in improving the torsion strength of existing tee grid products. It is also applicable in creating more efficient rollformed shapes by providing a means to use more than one metal strip.

Abstract: Miniature hollow beams for easy installation onto a conventional inverted T-bar subceiling framework are disclosed. The beams comprise two flat portions adapted to fit snugly against the T-bar rail, the beams having two hooked arms that snap over the edges of the rail and inwardly sloping, downwardly extending sidewalls that provide a decorative V-shaped or U-shaped appearance when sighted from below.

Abstract: Miniature beams for easy installation onto a conventional inverted T-bar subceiling framework are disclosed. The beams are composed of a flat portion or web adapted to fit snugly against the T-bar rail, the web having two hooked arms that snap over the edges of the rail and a plurality of elements extending from the web that provides a decorative pattern when sighted from below.

Abstract: Miniature beams for easy installation onto a conventional inverted T-bar subceiling framework are disclosed. The beams comprise a flat portion or web adapted to fit snugly against the T-bar rail, the web having two hooked arms that snap over the edges of the rail and at least one element extending from the web that has a decorative element at the end of its vertical extension.

Abstract: This invention comprises a suspended ceiling grid system having an adjustable compression strut installed between the grid members of the system and the building or construction superstructure which lies in a plane above the suspended ceiling. The adjustable compression strut stabilizes the ceiling system and prevents upward movement of the system such as might occur during a seismic shock or earthquake tremor. The compression strut comprises two co-axial, telescoping cylindrical strut members having a spring clip attached to the inner end of the inner strut member that allows the strut to be extended but not retracted. The compression strut is installed by simply holding it in position between the suspended ceiling grid and the superstructure and then extending the strut members until they are locked in place by the action of the spring clip.