Described herein are mineral fiber compositions having enhanced characteristics, such as biopersistence and resistance to heat induced shrinkage. Also described are methods for making and using the same. Such compositions may comprise manganese oxide and aluminum oxide.

An acoustic ceiling baffle that includes a baffle body and one or more attachment mechanisms disposed on a top edge of the baffle body configured to couple and decouple from a runner of a ceiling suspension system. The attachment mechanisms include a recessed portion that receives the runner. The recessed portion includes a first section and a second section with an opening disposed between the first section and the second section. The first section is configured to engage with a face of the runner when the acoustic ceiling baffle is coupled to the runner. The attachment mechanism further includes a first retention member and a second retention member formed around the recessed portion, each retention member comprising a bottom edge that is configured to engage with a top surface of a face of the runner.

A suspended ceiling arrangement for cleanroom applications includes an elongate support member and a ceiling member. The support member includes a base wall, a side wall, a flange part and a tab which together define a longitudinally extending support channel. The ceiling member includes a base wall, a side wall, a flange part and a lip part. The lip part defines a gap therein. In use, in an installed condition, the ceiling member flange part locates on top of the support member flange part, the lip part locates in the support channel and the tab locates in the gap.

A suspended ceiling arrangement for cleanroom applications includes an elongate support member and a ceiling member. The support member includes a base wall, a side wall, a flange part and a tab which together define a longitudinally extending support channel. The ceiling member includes a base wall, a side wall, a flange part and a lip part. The lip part defines a gap therein. In use, in an installed condition, the ceiling member flange part locates on top of the support member flange part, the lip part locates in the support channel and the tab locates in the gap.

Described herein is a coated building panel that comprises a side surface that is textured and exhibits a white and/or color. The building panel comprising an upper surface opposite a lower surface and a side surface extending between the upper surface and the lower surface, a coating applied to the side surface, the coating comprising an inorganic particle having a disk shape and an ionic dispersant comprising an ionic group that are present on a repeating unit and the ionic dispersant comprising at least two of the repeating units.

Described herein is a coated building panel that comprises a side surface that is textured and exhibits a white and/or color. The building panel comprising an upper surface opposite a lower surface and a side surface extending between the upper surface and the lower surface, a coating applied to the side surface, the coating comprising an inorganic particle having a disk shape and an ionic dispersant comprising an ionic group that are present on a repeating unit and the ionic dispersant comprising at least two of the repeating units.

A ceiling system for use in an interior building environment. In one aspect, the invention may be a ceiling system comprising: a frame comprising a plurality of struts; a plurality of modules, each of the modules comprising a panel and a plurality of hook members coupled to and extending from a top surface of the panel; each of the hook members comprising: an upstanding section; a hook portion at a top end of the upstanding section, the hook portion defining a downwardly-facing open slot; and an attachment flange at a bottom end of the upstanding section that couples the hook member to the top surface of the panel; and the modules mounted to the frame, and wherein for each of the modules, the hook portions of the hook members fit over and rest upon the struts, the struts located in the downwardly-facing open slots of the hook portions.

A ceiling system for use in an interior building environment. In one aspect, the invention may be a ceiling system comprising: a frame comprising a plurality of struts; a plurality of modules, each of the modules comprising a panel and a plurality of hook members coupled to and extending from a top surface of the panel; each of the hook members comprising: an upstanding section; a hook portion at a top end of the upstanding section, the hook portion defining a downwardly-facing open slot; and an attachment flange at a bottom end of the upstanding section that couples the hook member to the top surface of the panel; and the modules mounted to the frame, and wherein for each of the modules, the hook portions of the hook members fit over and rest upon the struts, the struts located in the downwardly-facing open slots of the hook portions.

The partially lit T-bar includes a spine with a rest shelf at a lower portion thereof. The rest shelf supports adjacent ceiling tiles. The under surface of the rest shelf includes a lighting module on a portion and a plain unlit undersurface on other portions. Additional T-bars which are shorter, and typically fully lit or fully unlit and half the length of the partially lit T-bar are also provided which can attach at ends or near a midpoint of the partially lit T-bar and typically perpendicularly thereto. A great variety of lighting patterns in a dropped ceiling is thus facilitated. Each of the T-bars preferably also includes a heat sink on an upper portion of the spine and also preferably a lower heat sink on an upper portion of the rest shelf. Heat associated with the light element of the T-bar can thus be drawn away from a space below the ceiling.

A ceiling suspension system that includes a plurality of acoustic panels that are configured to be installed or attached into openings of a grid formed by main runners and cross runners of the ceiling suspension system. The acoustic panels include a plurality of main blades that extend in the same direction as the main runners and cross blades that extend in the same direction as the cross runners. Two or more of the main blades comprise a kerf in a first lateral edge of each main blade. The kerf comprises a first slot and a second slot that form a stepped configuration.