Abstract: A suspended ceiling system comprising a plurality of spaced parallel main runners, a plurality of spaced parallel panel support bars intersecting and being fixed to the main runners at an oblique angle, a plurality of rhomboidal panels having angles equal to said oblique angle suspended from the bars, the panels having nominal width dimensions that are equal to or whole fractions of a distance between adjacent runners, the panels having opposed first edges extending perpendicularly to a direction in which a width of a panel is measured and opposed second parallel edges extending in a direction that is at said oblique angle relative to a direction that the first edges extend, the second panel edges underlying respective bars and having attached torsion springs received in slots formed in the bars.

Abstract: A suspended ceiling comprising SUSPENDED metal runners in a horizontal plane, the runners each having a horizontal flange having an effective vertical thickness, a plurality of rectangular drywall sheets aligned crosswise to the runners and screwed to the flanges with ends of the drywall sheets forming butt joints midway between adjacent runners, boards overlying butt joints and adjacent flanges, the boards being substantially stiffer than the drywall sheets, whereby the drywall sheet ends are drawn up towards an upper level of the flanges when screwed against the overlying board so that a pseudo taper is formed on the drywall sheet ends.

Abstract: Components for constructing a ceiling grid across a span free of or with a limited number of suspension wires including main runners with a relatively high moment of inertia secured at their ends with brackets to wall moldings on opposing walls.

Abstract: In combination, extruded aluminum trim strips joined end-to-end and a splice plate, the trim strips together, the trim strip cross-sections including a web and a pair of opposed angles, the angles and web forming a track for receiving a mid-section of the splice plate with a close sliding fit, the splice plate having lever tabs at opposite ends, notches at sides of the plate, the plate being disposed in the tracks of both lengths of trim strips, the lever tabs and associated edges of the lever tabs formed by the notches being outside of the tracks, the associated edge being arranged in a locking manner with outer surfaces of the angles as a result of the lever tabs being bent in place towards the web.

Abstract: Components for constructing a ceiling grid across a span free of or with a limited number of suspension wires including main runners with a relatively high moment of inertia secured at their ends with brackets to wall moldings on opposing walls.

Abstract: A suspended drywall ceiling grid construction comprising a plurality of uniformly spaced parallel sheet metal support bars, a plurality of spaced grid tees carried on lower sides of the support bars, the support bars having regularly spaced centers for engaging and supporting grid tee reinforcing bulbs, the centers and grid tees being constructed and arranged to present lower faces of flanges of the grid tees in a common plane, the support bars having intermediate centers between said regularly spaced centers for receiving butt joint tees, the intermediate centers and butt joint tees being constructed and arranged to present lower faces of flanges of the butt joint tees in a plane a predetermined distance above the common plane.

Abstract: A panel assembly for a suspended ceiling comprising a sheet metal body and support brackets attached to the body, the sheet metal body having a rectangular generally planar face portion, a side portion along each of four edges of the face portion, the side portions extending upwardly from the face portion edges to side portion edges, and flanges extending inwardly from the side portion edges such that the flanges overlie and are spaced from the face portion, the side portions intersecting at corners of the panel assembly and the flanges being adjacent the corners, a hanger bracket associated with each corner abutting and fixed to the flanges adjacent each corner, the hanger bracket having at least one hole for attaching a suspension wire at a location spaced from said each corner a distance substantially greater than a width of the flanges adjacent said each corner.

Abstract: A clip for attaching an extruded decorative trim strip of the type having a clip receiving track formed on the rear face of the strip to support structure, comprising a stamped one piece sheet metal body, the body being generally flat and generally rectangular in plan view, an attachment tab within a perimeter of the body, and partially separated from the body by slots at respective edges of the tab, the tab being foldable out of a plane of the body by application of a manually developed force, said tab being constructed when folded to assume an orientation in a plane outside of a plane of the body, the tab including a locking portion adapted to project from the plane of the body of the clip on a side of the clip opposite a side on which a major portion of the tab lies when folded.

Abstract: A splice clip for a trim strip of the type having a receiving track with re-entrant flanges, the clip being formed as a single piece sheet metal body having an elongated configuration with parallel edges along opposed long sides lying in a flat plane, a locking tab on each longitudinal half of the body supported on an integral hinge, each locking tab having a locking edge eccentric of the respective hinge, each locking tab being pivotal on the respective hinge from an initial position with said locking edge in said plane to a locking position in which said locking edge is out of said plane whereby it is adapted to frictionally lock against a surface of the trim strip associated with the clip receiving track.

Abstract: A support bar, and method of its manufacture, for suspending grid members of a suspended ceiling, the bar being formed of a length of a sheet metal strip, a lower portion of the bar having regularly spaced holes for receiving and supporting bulbs of grid runners, an upper portion of the bars having longitudinally extending formed ribs, the ribs extending laterally from both sides of a central plane in which the lower portion lies.

Abstract: Components for constructing a ceiling grid across a span free of or with a limited number of suspension wires including main runners with a relatively high moment of inertia secured at their ends with brackets to wall moldings on opposing walls.

Abstract: Components for constructing a ceiling grid across a span free of or with a limited number of suspension wires including main runners with a relatively high moment of inertia secured at their ends with brackets to wall moldings on opposing walls.

Abstract: Components for constructing a ceiling grid across a span free of or with a limited number of suspension wires including main runners with a relatively high moment of inertia secured at their ends with brackets to wall moldings on opposing walls.

Abstract: An elongate roll formed sheet metal molding, and method of its manufacture, for transitioning between a drywall ceiling and an acoustical tile ceiling, the molding have the general shape of an inverted tee formed by a horizontal drywall leg, a horizontal acoustical tile leg and a vertical leg between the horizontal legs, the drywall leg having a plurality of regularly spaced holes for receiving fasteners to attach the molding to a ceiling structure, a periphery of each hole being partially lanced in the sheet metal such that material from the hole forms a slug, the slug remaining attached to the sheet metal at a part of the hole, the slug being bent flat onto an area of the sheet metal adjacent the hole.

Abstract: A rectangular panel for a suspended ceiling, the panel having a suspension spring with two divergent arms at each of two opposed panel edges mounted on a rear side of the panel, each spring being mounted on the panel in an arrangement permitting the arms to lie parallel to a front face of a panel, project rearwardly perpendicular to the front face and to lie outside of the panel parallel to the front face, the spring mounting arrangement enabling the spring to be maintained in the rearward orientation by a force developed by the spring with its arms confined and locator elements for registering the panel with grid members of the ceiling.

Abstract: A rectangular panel for a suspended ceiling, the panel having a suspension spring with two divergent arms at each of two opposed panel edges mounted on a rear side of the panel, each spring being mounted on the panel in an arrangement permitting the arms to lie parallel to a front face of a panel, project rearwardly perpendicular to the front face and to lie outside of the panel parallel to the front face, the spring mounting arrangement enabling the spring to be maintained in the rearward orientation by a force developed by the spring with its arms confined and locator elements for registering the panel with grid members of the ceiling.

Abstract: A perimeter trim attachment clip formed as a single piece sheet metal stamping, the clip having a base, top and bottom rearwardly extending trim engaging grips on the base, the grips having a free edge distal from the base adapted to engage respective top and bottom hems of a perimeter trim channel, a standoff projecting rearwardly of the base beyond the grip edges, the standoff being adapted to abut the side of a grid runner extending parallel along the periphery of a free edge of a ceiling, a squaring tab connected to the base and configured to extend over the parallel extending grid runner and be attached to a reinforcing bulb of a grid runner intersecting the parallel grid runner.