A formulation for an acoustically transparent coating for use on an acoustical substrate comprising a water dispersible binder and relatively large filler particles, and characterized by a high pigment to volume concentration, high viscosity, high shear thinning, and fast drying to enable the formulation to be sprayed in droplets that retain their identity when in mutual contact and in a dry coating can be efficiently sanded flat.

A ceiling system having a perimeter frame; a grid configured to support a plurality of substrates; and a plurality of bracket assemblies coupling the grid to the perimeter frame, the plurality of bracket assemblies adjustable between a plurality of states in which the grid is supported at a different height relative to the perimeter frame in each of the plurality of states.

A method, system, and tool are disclosed for installation of ceiling tiles in an improved mounting hook assembly to form a concealed grid system The system includes elements for attaching the mounting hook assembly to the tile; rotating a load bearing lever member; rotating a positioning lever member to position the load bearing member on a flange of a T grid bar; and fixing the tile below the T grid at a distance that is greater than the thickness of the tile so that when the tile is lifted up, the load bearing lever is returned to a position above the flange level of the T grid and any tile can be removed or installed in a totally concealed grid system without dislocating tiles already laid. A tool is used to engage and disengage the tiles.

A fire sprinkler support assembly is provided. In some approaches, the fire sprinkler support assembly may include a bracket bar extending transverse to a beam, and a bracket assembly coupled to the bracket bar. The bracket assembly may include an upper wall and a set of plates extending from the upper wall, wherein the set of plates have a first end coupled to the bracket bar. An interior angle between the set of plates and the bracket bar is less than 90 degrees (e.g., 80-85). The bracket assembly may further include a seating frame extending from a second end of the set of plates, the seating frame including a first member and a second member disposed on opposite sides of the beam. The fire sprinkler support assembly may further include a fastener extending through an opening of the upper wall to couple the set of plates to the bracket bar.

A ceiling suspension system is disclosed and includes a plurality of grid members configured to form a grid for the ceiling suspension system, each grid member comprising a bulb, a web and a flange. The system also includes a plurality of wall support brackets configured to mount the grid to walls in a structure. Each wall support bracket comprises a vertical back, a lower flange at a lower end of the vertical back, and an upper flange at an upper end of the vertical back. Further, the upper flange is generally V-shaped when viewed longitudinally and each wall support bracket only one tab in the lower flange for each grid member. Moreover, the only one tab is configured to engage and retain the flange of a respective grid member, such that the respective grid member rests on the lower flange.

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 bracket assembly includes an inner plate defining a first end and a second end opposite the first end; an outer plate defining a first end and a second end opposite the first end, the outer plate substantially parallel with the inner plate; and a seating frame comprising: a first member extending from the second end of the inner plate, the first member defining a first free end distal to the inner plate; a second member extending from the second end of the outer plate, the second member defining a second free end distal to the outer plate, wherein the seating frame is configured to receive a beam between the first member and the second member; and a first fastener extending through one of the first member or the second member and configured to engage the beam to retain the seating frame on the beam.

A grid mounting system for a suspended ceiling system in one embodiment includes a support structure and a mounting bracket coupled to the support structure. An elongated first grid member is pivotably coupled to the mounting bracket about a pivot axis defined by a pivot member. The first grid member is movable about the pivot axis in a plurality of angular mounting positions. In one embodiment, the grid mounting system further includes a second grid member which may be pivotably or fixedly coupled to the mounting bracket. The support structure may be a wall or perimeter trim bracket attached to the wall in some installations.

The invention provides a bracket design for connecting cross and main tees of a suspended ceiling in non-rectangular joints to provide a wide variety of ceiling patterns including rhombic and triangular shapes.