A novel design of rails for a suspended ceiling, the rails including expansion absorbers. The absorbers are produced so that the rails can absorb an expansion while maintaining the integrity of the ceiling, so that the ceiling panels do not fall in the event of a fire. The rails maintain a significant load-bearing capacity despite the presence of one or more expansion absorbers over the length thereof.

A configurable lighting assembly for use in suspended ceiling grid systems which provides novel T-Bar mounting options. The lighting assembly comprises two configurable length linear lighting modules in a novel parallel arrangement. End plates support, and enclose longitudinal ends of the elongate body of each linear lighting modules and are used to set a configured width and functional gap spacing of the linear lighting modules. The end plates further connect and support the lighting assembly when fixed or mounted or removably to T-Bars positioned at either or both perpendicular and parallel alignment angles.

Lighting assemblies with various embodiments of end plates and linear lighting modules are presented, each with novel mounting characteristics. In some cases the lighting assembly mounts perpendicularly on its end and spans the gap between two T-Bars. In other cases the lighting assembly mounts longitudinally on a single T-Bar. Finally, embodiments are shown where the lighting assembly mounts both perpendicularly and longitudinally to different T-Bars in a ceiling grid layout.

The lighting assembly further comprises a novel arrangement of LED light sources, transmissive optical elements, light shaping lenses, reflectors and other functional components supported and housed within the elongate body of each linear lighting module. The transmissive optical elements may be backlit or edgelit from one or two sides and aligned horizontally or tilted relative to the ceiling grid plane. The lighting assembly can provide a range of useful symmetric, asymmetric and tilted non-lambertian lighting distributions.

A yoke for a ceiling suspension system is disclosed. For example, the yoke may include a yoke body having an upper end configured to be mounted only to another yoke, or to an extension mounted to the other yoke. The yoke body may have a lower end having a first mount configured to be mounted to a first ceiling support member (CSM), and a second mount configured to be mounted to a second CSM that differs from the first CSM. In one version, no portion of the yoke body extends through any portion of the first CSM and the second CSM.

A wall support for a ceiling support grid with grid members is disclosed. Each grid member can have a top with a bulb, a web extending downward from the bulb, and a bottom with a flange extending from the web opposite the bulb. Examples of the wall support may include a bracket having a C-shaped channel with a back, a lower flange at a lower end of the back, and an upper flange at an upper end of the back. In addition, the bracket may include only one tab in the lower flange for each grid member. The only one tab may be configured to engage and retain the flange of a respective grid member. The grid member may rest on the lower flange. The lower flange may have no other features for positive engagement with and retention of the flange of the respective grid member.

A grid hanger assembly for mounting a ceiling system to an overhead support structure. The grid hanger assembly may include a mounting bracket having a mounting element and being configured for attachment to the overhead support structure and a hanger member. The hanger member may include an adjustment plate and a coupling member extending from the adjustment plate. The adjustment plate may include a plurality of mounting elements arranged in an axially spaced apart manner. The hanger may be mounted to the mounting bracket in a selected mounting position of a plurality of selectable mounting positions determined by sliding the hanger member relative to the mounting bracket in a direction of the vertical axis until a selected one of the plurality of mounting elements of the hanger member is aligned with the mounting element of the mounting bracket. A fastener may lock the hanger member to the mounting bracket.

An edgelit multifunctional lighting assembly is configured as a cross tee within a suspended ceiling system and supports at least one ceiling panel and is configurable to produce symmetric and asymmetric targeted light distributions for narrow and wide angle illumination applications.

A ceiling system comprises a pair of spaced overhead longitudinal grid support members and a light-weight ceiling panel suspended therefrom. The panel may be an acoustical honeycomb panel in one embodiment. Localized elongated reinforced areas or sections are formed on the top facing which support a plurality of hangers mounted on each section. The reinforced sections coincide in arrangement with the layout of the support members and structurally strengthen the top facing in select areas. In one embodiment, each reinforced section may comprise a stiffening spline attached to the top facing. The ceiling panel is hung from the grid support members via the hangers and reinforced sections. Fasteners may be used to attach the hangers to the reinforced sections which resist pullout when the panel is hung. In certain embodiments, the reinforced sections extend longitudinally through a central portion of the panel to prevent sagging between the panel sides.

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.

A ceiling framework includes main beams and cross beams, which are connected to one another and transversally to one another by connectors borne by one type of beams among the main beams and the cross beams, and engaged in apertures made in the other type of beams among the main beams and the cross beams, so as to receive tiles. For each beam having the apertures, the apertures are marked with symbols on each face of the beam, the symbols marked on each face being repeated sequentially over the length of the beam, the period of the sequences of symbols on each face being equal to a given tile size. The marking is the same on either face of the beam, starting with the same symbol on each left-hand or right-hand end for each observed face.

A suspension system for a suspended ceiling includes, in an installed state, a primary profile which substantially extends in a first horizontal direction, one or more suspension elements for the suspension of the primary profile, a secondary profile which extends in a substantially second horizontal direction and which is configured to support ceiling plates, a coupling bracket for the coupling of the primary profile to the secondary profile. The coupling bracket includes a main body which couples to the primary profile; two coupling legs which extend from the main body and which connect to the secondary profile; and a positioning element which is configured to work with the primary profile to position the coupling bracket in relation to the primary profile.