Abstract: The expansion joint for the runner is formed with two cut-out areas and cuts in the vertical web to permit the horizontal web, enlarged bulb and remaining web by the cut-out areas to bend outward to absorb expansion of the runner when subjected to fire.

Abstract: An end detail for a ceiling runner is provided incorporating a tongue extending from the end of the ceiling runner with a tab formed as part of the tongue. Due to the construction of the ceiling runner, the tab is formed from two side-by-side pieces of metal which tend to separate. A means is provided near the base of the tab on the tongue for displacing a portion of the metal of the tongue laterally within the plane of the tongue to lock together the two pieces of metal forming the tongue.

Abstract: An acoustical ceiling tile is provided with a metal facing sheet covering at least one raised rib on the surface of the acoustical tile. The raised rib has two parallel sides and the facing sheet is made with two parallel edges having the ends thereof spaced apart a distance slightly less than the rib width. Consequently, the edges of the facing sheet will engage the edges of the rib and frictionally hold the facing sheet over the flat surface of the rib.The above structure will permit humidity and temperature to cause fluctuation in the dimensions of the base sheet containing the raised rib without resulting in any distortion of the metal facing sheet.

Abstract: A method is provided for adding strength to a T-bar grid fabricated with a double web and capped system. The addition of strength is achieved by coating the inside portions of the T-bar with a hot melt adhesive. Cooling sets the adhesive and results in the parts of the grid member becoming a unitized structure.

Abstract: A ceiling runner is provided with added strength to its T-bar configuration. The runner is fabricated with a double piece vertical web and two horizontal flanges. The T-bar is strengthened by fastening together the double web structure at the region of the base of the vertical web. The fastening together of the double web structure can be carried out through the use of a hot melt adhesive, a welding, a lancing pattern, etc.

Abstract: The ceiling tile suspension system is composed of a runner structure and a clip structure. The runner structure is generally trapezoidal in cross section with two flanges spaced away from a ceiling structure. The clip structure includes a flat base portion with flanges that grasp the flanges of the runner. The clip structure has a serrated edge connected to the flat base portion and the serrated edge either digs into the edge of the ceiling tile or slips into a kerf in the edge of the ceiling tile to hold the ceiling tile in position against the clip flat base portion.

Abstract: The invention is primarily directed towards a splice for fastening together metal furring strips which are mounted to a ceiling. Ceiling tiles are placed adjacent the metal furring strips and staples are driven through the ceiling tiles into the metal furring strips to mount the ceiling tiles in position.

Abstract: The invention is directed to a clip structure for fastening a specific type of ceiling panel to a specific type of support structure. Both the support structure and ceiling panel have flanges and the clip spans the two flanges to fasten them together.

Abstract: The invention is directed to a ceiling runner which has a generally U-shaped configuration. The runner has flanges to support ceiling boards. The side walls of the runner are formed with grooves which may be used to support the runner in position or define an isolated chamber within the body of the runner. The side walls of the runner have a second groove which is used for positioning ceiling boards on the flanges. Locking means are provided on the end and side of two adjacent ceiling runners to lock the ceiling runners together.

Abstract: The invention is directed to a ceiling runner which has a generally U-shaped configuration and a means for attaching a cross tee thereto. The runner has flanges to support ceiling boards. The side walls of the runner are formed with grooves which may be used to support the runner in position or define an isolated chamber within the body of the runner. The side walls of the runner have a second groove which is used for positioning ceiling boards on the flanges. A fastening means is provided to connect the end of a cross tee runner to the side of the U-shaped runner.

Abstract: The invention is directed to a ceiling runner which has a generally U-shaped configuration. The runner has flanges to support ceiling boards. The side walls of the runner are formed with grooves which may be used to support the runner in position or define an isolated chamber within the body of the runner.

Abstract: The invention is directed to a ceiling runner which has a generally U-shaped configuration. The runner has flanges to support ceiling boards. The side walls of the runner are formed with first grooves which may be used to support the runner in position or define an isolation chamber within the body of the runner. The side walls of the runner have second grooves which are used for positioning ceiling boards on the flanges. A closure member is used in combination with this ceiling runner to close off either the bottom of the runner or the top of the runner.

Abstract: An elongated metal clip, substantially L-shaped in cross section, is provided for joining the tiles in a starting row of a suspended ceiling system in edge-aligned relationship and stabilizing them against possible subsequent misalignment. The base of the clip is adapted to be placed on the top surface of a tile adjacent its edge portion. The integral flange on the clip extends downwardly over the edge of the tile and has prongs extending from each side adapted to penetrate the edge portion of this tile and the adjoining edge portion of an adjacent tile. The clip is installed so that one end is in contact with a wall-mounted support member for the tile to further assure stabilization against misalignment thereof. The design of the clip is such that, if it is dropped or placed on a surface, no potentially dangerous upstanding projections are present.

Abstract: A metal clip for joining the tiles in a starting row of a suspended ceiling system with their edges which are farthest from the wall in aligned relationship and stabilizing them against possible subsequent misalignment is described. The clip comprises a body member having two planar, longitudinally extending side portions. An intermediate portion joining the side portions has a central portion which is elevated above the plane of the sides. Downwardly projecting prongs are provided adjacent one end of the clip on each side thereof. The opposite end of the clip has no prongs. The clip is installed to overlie the opposing back edges of a pair of adjacent edge-aligned tile, with the end of the clip which has no prongs being in contact with a wall-mounted support member for the tile, and the prongs adjacent the opposite end of the clip being embedded in the back surfaces of the tiles adjacent their edge portions. The tiles are thus joined and stabilized against misalignment.