Abstract: A curvable grid tee for suspending drywall capable of being configured vertically into convex or concave shapes comprising a series of identical web segments joined end-to-end, the segments being formed of sheet metal into a tee shaped cross section, the sheet metal of a segment being folded such that each segment has a vertical double layer stem with the stem layers joined at a common fold at upper edges thereof, the sheet metal at lower edges of each layer of the stem being bent outwardly to form a flange, a junction between adjacent segments permitting such adjacent segments to be angularly displaced relative to one another in a vertical plane such that the flanges are capable of supporting a drywall panel in a curved plane.

Abstract: A splice plate for joining and aligning extruded trim strips used in suspended ceiling islands and fascias of the type having a pair of opposed flanged channels on its rear face, the splice plate having upper and lower flanges proportioned to slide into the pair of channels and a pair of clamping elements, each of the clamping elements being disposed in a rearwardly horizontally spaced relation to a respective one of said splice plate flanges, a machine screw associated with each clamping element and arranged when turned to draw the respective clamping element forcibly towards an associated plate flange to thereby clamp an intervening portion of a trim channel flange, said plate being sufficiently long to span between a pair of end abutted trim strips.

Abstract: A clip having a first leg for attaching to a trim strip and a second leg for attaching to a grid runner, the first leg having a backer plate attached with a screw through a slot, a head of the screw on a side of the first leg facing the second leg, the backer plate on the other side of the first leg, an upper edge of the first leg in a downwardly facing groove on a backside of the trim strip, the backer plate fitting between a depending free edge of the upper groove and an upstanding edge of a lower upwardly facing groove when the screw is up in the slot, and being received in the lower groove when the screw is down in the slot and clamping between the upstanding edge and a rear face of the trim strip when the screw is tightened.

Abstract: A curvable grid tee for suspending drywall capable of being configured vertically into convex or concave shapes comprising a series of identical web segments joined end-to-end, the segments being formed of sheet metal into a tee shaped cross section, the sheet metal of a segment being folded such that each segment has a vertical double layer stem with the stem layers joined at a common fold at upper edges thereof, the sheet metal at lower edges of each layer of the stem being bent outwardly to form a flange, a junction between adjacent segments permitting such adjacent segments to be angularly displaced relative to one another in a vertical plane such that the flanges are capable of supporting a drywall panel in a curved plane.

Abstract: A splice plate for joining and aligning extruded trim strips used in suspended ceiling islands and fascias of the type having a pair of opposed flanged channels on its rear face, the splice plate having upper and lower flanges proportioned to slide into the pair of channels and a pair of clamping elements, each of the clamping elements being disposed in a rearwardly horizontally spaced relation to a respective one of said splice plate flanges, a machine screw associated with each clamping element and arranged when turned to draw the respective clamping element forcibly towards an associated plate flange to thereby clamp an intervening portion of a trim channel flange, said plate being sufficiently long to span between a pair of end abutted trim strips.

Abstract: A clip having a first leg for attaching to a trim strip and a second leg for attaching to a grid runner, the first leg having a backer plate attached with a screw through a slot, a head of the screw on a side of the first leg facing the second leg, the backer plate on the other side of the first leg, an upper edge of the first leg in a downwardly facing groove on a backside of the trim strip, the backer plate fitting between a depending free edge of the upper groove and an upstanding edge of a lower upwardly facing groove when the screw is up in the slot, and being received in the lower groove when the screw is down in the slot and clamping between the upstanding edge and a rear face of the trim strip when the screw is tightened.

Abstract: Mounting systems for attaching metal suspended ceiling panels to form a decorative rectangular array. In one system the panels are mounted on bolt slot grid runners spaced from the wall and trimmed with island ceiling trim. In another system, panels are mounted on unique backer boards that protect the panels against physical damage by resisting compressive forces on the face of the panels.

Abstract: A suspended ceiling grid tee of conventional cross-sectional shape having a plurality of generally planar parallel and orthogonal surfaces and at least two electrically isolated conductor strips attached to the planar areas of the tee surfaces extending along substantially the full length of the tee, a connector for supplying low voltage electrical power to or from the conductors, the connector having a configuration complementary to the cross-sectional shape of the grid tee and including at least two electrical contacts for energizing each of said conductor strips when said connector is positioned on said grid tee.

Abstract: A wall brace support for an acoustical ceiling tee having a bulb includes an elongated main portion having two ends; a wall attachment tab at one of the ends, the tab being operable to abut the wall and receive at least one fastener therethrough to fasten the tab to the wall; and an acoustical ceiling tee attachment structure at the other end, the structure being operable to receive at least one fastener therethrough to fasten the structure to the bulb at a location spaced away from the wall.

Abstract: An electrified grid for a suspended ceiling comprising first and second grid sections lying in a common ceiling plane, each grid section having metal main tees and metal cross tees intersecting with the main tees, the first and second sections being adjacent one another and having respective main tees in parallel alignment and with a fixed spacing not substantially greater than the length of the cross tees, the grid sections being electrically insulated from one another whereby at least said main tees of fixed spacing can be held at opposite voltage polarities and an electrical device carried on or above the ceiling can be powered by electrical connection of separate ones of its leads to the metal tees of a respective one of said first and second grid sections.

Abstract: An attachment device useful with suspended ceiling systems is provided. In disclosed embodiments, the device comprises a clip that matingly engages a bulb of a ceiling grid tee. The device may include a reinforcing sleeve and can be used to increase the load carrying capacity of suspended ceiling systems while providing a simple, quick method of attaching the suspended ceiling grid to the true ceiling.

Abstract: A wall brace support for an acoustical ceiling tee having a bulb includes an elongated main portion having two ends; a wall attachment tab at one of the ends, the tab being operable to abut the wall and receive at least one fastener therethrough to fasten the tab to the wall; and an acoustical ceiling tee attachment structure at the other end, the structure being operable to receive at least one fastener therethrough to fasten the structure to the bulb at a location spaced away from the wall.

Abstract: An attachment device useful with suspended ceiling systems is provided. In disclosed embodiments, the device comprises a clip that matingly engages a bulb of a ceiling grid tee. The device may include a reinforcing sleeve and can be used to increase the load carrying capacity of suspended ceiling systems while providing a simple, quick method of attaching the suspended ceiling grid to the true ceiling.

Abstract: A short span flat drywall ceiling construction comprising a pair of spaced parallel wall angles facing one another, the wall angles each having a vertical leg secured to vertical support surfaces and a horizontal leg cantilevered from its respective vertical leg towards the other wall angle, a plurality of substantially identical roll-formed sheet metal tees extending between the wall angles and vertically supported thereby, each tee having a main body formed of a single strip of sheet steel, the tee having a horizontal single layer lower flange, a vertical double layer central web disposed above the flange, and a bulb at the top of the web centered on a plane of symmetry, a sheet metal U-shaped reinforcement channel fitted on a central part of the length of the tee such that it is in contact with at least the sidewalls of the bulb.

Abstract: An electrified grid for a suspended ceiling comprising first and second grid sections lying in a common ceiling plane, each grid section having metal main tees and metal cross tees intersecting with the main tees, the first and second sections being adjacent one another and having respective main tees in parallel alignment and with a fixed spacing not substantially greater than the length of the cross tees, the grid sections being electrically insulated from one another whereby at least said main tees of fixed spacing can be held at opposite voltage polarities and an electrical or electrical device carried on or above the ceiling can be powered by electrical connection of separate ones of its leads to the metal tees of a respective one of said first and second grid sections.

Abstract: A suspended ceiling grid tee of conventional cross-sectional shape having a plurality of generally planar parallel and orthogonal surfaces and at least two electrically isolated conductor strips attached to the planar areas of the tee surfaces extending along substantially the full length of the tee, a connector for supplying low voltage electrical power to or from the conductors, the connector having a configuration complementary to the cross-sectional shape of the grid tee and including at least two electrical contacts for energizing each of said conductor strips when said connector is positioned on said grid tee.

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.