Abstract: Ceiling panels for use in a grid-type suspended ceiling (10) each comprise a thin flexible scrim (40) that is of insufficient rigidity to consistently maintain a substantially planar form when installed in the grid-type suspended ceiling. These embodiments also present a rigidizing and engagement member (60, 122, 161) that attaches to only a relatively minor portion of the thin flexible scrim and that is configured and arranged to substantially increase and maintain rigidity of the thin flexible scrim such that the thin flexible scrim will consistently maintain a substantially planar form when installed in the grid-type suspended ceiling and that will also serve to engage at least one grid runner of the grid-type suspended ceiling to thereby maintain the thin flexible scrim in an installed position within the grid-type suspended ceiling.

Abstract: A sheet metal clip for connecting the ends of three or four grid runners with their longitudinal axii intersecting at a common center and at obtuse or acute angles relative to each other, the clip having a leg for each one of the grid runners, each leg, in use, extending in a vertical plane from the center and being permanently bendable at the center to allow the leg to be adjusted to a desired angle of a respective grid runner.

Abstract: A clip for mounting an elongated trim strip on ends of ceiling grid runners, having a right angle configuration with two intersecting legs, one leg adapted to laterally abut an end of a grid runner and the other being adapted to engage the trim strip, said other leg having oppositely extending upper and lower grips for reception into upper and lower opposing channels of the trim strip, the grips being relatively moveable, and a toggle arrangement for moving said grips away from one another, when retracted, the grips being capable of passing between the opposed channels, the toggle arrangement selectively maintaining said grips in an extended position to frictionally lock onto the opposed channels of the trim strip.

Abstract: A sheet metal yoke for supporting a pair of main runners of a suspended ceiling grid in parallel alignment with a relatively narrow spacing, the yoke having an inverted U-shape with a horizontal span and a depending leg adjacent each end of the span, a lower end of each leg having a tab extending towards the other leg, the tab being proportioned to fit in a cross runner slot of a main runner and being capable of vertically supporting the main runner at a desired elevation.

Abstract: A seismic bracket for supporting ends of suspended ceiling grid runners from a wall comprising a stamped sheet metal body, the body having a horizontally extending portion and a vertically extending portion, the vertically extending portion, in its installed position, rising above the top of a standard grid runner a distance at least 1½ times the height of such standard grid runner, the vertically extending portion having two sections generally coextensive in the vertical direction, a first section being integral with the horizontally extending portion and a second section arranged to be in a vertical plane that intersects a vertical plane occupied by the horizontally extending portion, the horizontally extending portion being arranged to support a grid runner to move longitudinally a limited distance, the second section of the vertically extending portion having an aperture for securing the bracket to the wall at a location substantially above the grid tee.

Abstract: A grid runner and method of its manufacture that saves material content with use of a serpentine sheet metal web configured to be essentially scrapless and that results in a parallel chord truss-like construction with open spaces between an upper reinforcing bulb and a lower flange.

Abstract: A sheet metal yoke for supporting a pair of main runners of a suspended ceiling grid in parallel alignment with a relatively narrow spacing, the yoke having an inverted U-shape with a horizontal span and a depending leg adjacent each end of the span, a lower end of each leg having a tab extending towards the other leg, the tab being proportioned to fit in a cross runner slot of a main runner and being capable of vertically supporting the main runner at a desired elevation.

Abstract: A roll formed sheet metal grid runner, and method of its manufacture, for a suspended ceiling grid having indexing tabs stamped from a central web of the runner profile, the tabs being effective to reliably locate ceiling panels and, when the grid runner is nested with other identical runners in a package, avoid marring of visible surfaces.

Abstract: A cross runner connector receivable in a through runner hole that locks with an identical opposed connector and locks with the through runner hole with increased tensile strength, both locks being releasable without tools by manipulation of the associated cross runner.

Abstract: A roll formed sheet metal grid runner, and method of its manufacture, for a suspended ceiling grid having indexing tabs stamped from a central web of the runner profile, the tabs being effective to reliably locate ceiling panels and, when the grid runner is nested with other identical runners in a package, avoid marring of visible surfaces.

Abstract: Ceiling panels for use in a grid-type suspended ceiling (10) each comprise a thin flexible scrim (40) that is of insufficient rigidity to consistently maintain a substantially planar form when installed in the grid-type suspended ceiling. These embodiments also present a rigidizing and engagement member (60, 122, 161) that attaches to only a relatively minor portion of the thin flexible scrim and that is configured and arranged to substantially increase and maintain rigidity of the thin flexible scrim such that the thin flexible scrim will consistently maintain a substantially planar form when installed in the grid-type suspended ceiling and that will also serve to engage at least one grid runner of the grid-type suspended ceiling to thereby maintain the thin flexible scrim in an installed position within the grid-type suspended ceiling.

Abstract: A seismic clip for suspended ceiling grid tees that offers high strength, rigidity, versatility and ease of assembly while improving the ability of a clip to self-align with a grid tee. The clip includes a lanced tab that serves to establish and maintain alignment of the clip body and the tee to which it is assembled whereby a tendency of a clip to be tilted upwardly relative to the tee is eliminated or greatly reduced. The alignment tab serves to initially align the clip and tee either when it is assembled by snapping it over the tee or by sliding the tee endwise into the clip. The tab is configured so that it does not unduly add to the assembly force level when the clip is snapped over the tee or when the tee and clip are slipped endwise together.

Abstract: A suspended ceiling grid runner comprising separate parallel upper and lower chords, a plurality of identical web plates fixed between the chords and the plates having a height less than the height of the grid runner and a width, the chords being made of roll-formed sheet metal strips and symmetrical about a vertical plane, the chordal strips each having marginal sections folded parallel to one another and on opposite sides of the vertical plane, the web plates including vertical slots for receiving connectors of cross runners, the web plates being spaced at regular centers along the grid runner with a distance that is a small fraction of the nominal length of the grid runner, the gaps between adjacent web plates being longer than the height of the grid runner.

Abstract: A cross runner connector receivable in a through runner hole that locks with an identical opposed connector and locks with the through runner hole with increased tensile strength, both locks being releasable without tools by manipulation of the associated cross runner.

Abstract: Suspended ceiling grid runners include a flange extending laterally to both sides, the flange forming a three dimensional face including sides visible from below a plane of the grid, opposed cross runners intersecting through runners with their ends joined by mutually interlocking end connectors extending through a slot in the through runner, the cross runner ends including end edges configured to abut a respective side of the flange of the through runner, a connector when connected to an opposite connector causes the associated end edges to resiliently locally deflect the abutted flange side to substantially eliminate any gap therebetween.

Abstract: A roll-formed grid runner comprising a sheet metal strip folded into an upper hollow single wall reinforcing bulb, a double wall web below the bulb, a channel extending laterally from both sides of a lower end of the web to a bend and upwardly from the bend to a panel supporting elevation, the bend on each side of the web existing at a longitudinally extending score line where a thickness of the strip is locally reduced.

Abstract: A suspended ceiling grid runner comprising separate parallel upper and lower chords, a plurality of identical web plates fixed between the chords and the plates having a height less than the height of the grid runner and a width, the chords being made of roll-formed sheet metal strips and symmetrical about a vertical plane, the chordal strips each having marginal sections folded parallel to one another and on opposite sides of the vertical plane, the web plates including vertical slots for receiving connectors of cross runners, the web plates being spaced at regular centers along the grid runner with a distance that is a small fraction of the nominal length of the grid runner, the gaps between adjacent web plates being longer than the height of the grid runner.

Abstract: In one embodiment, a roll-formed sheet metal tee for grid type suspended ceilings with the face of its flange integral with the stem and the layers of the stem fixed together for improved torsional strength. An upper region of the stem can have one or more of its layers folded to increase suspension wire breakout strength. A stiffening bulb is below suspension wire receiving holes so that a loop of the suspension wire through the tee has a narrow profile and thereby avoids interference with ceiling panels during their installation or removal. Other embodiments of a tee share the feature of a narrow, suspension wire receiving upper stem portion.

Abstract: A roll-formed grid runner comprising a sheet metal strip folded into an upper hollow single wall reinforcing bulb, a double wall web below the bulb, a channel extending laterally from both sides of a lower end of the web to a bend and upwardly from the bend to a panel supporting elevation, the bend on each side of the web existing at a longitudinally extending score line where a thickness of the strip is locally reduced.