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Approved drop out (or drop-out) ceilings allow the installation of a dropped ceiling beneath existing fire sprinklers because the tiles, sometimes called melt-out ceiling tiles, are heat-sensitive and are designed to fall from the dropped ceiling suspension grid during a fire, allowing the sprinklers to spray their water.
Alternatively, ceilings may be spray painted instead, leaving the pipework and ducts exposed but painted, and using spray foam. A subset of the dropped ceiling is the suspended ceiling, wherein a network of aluminum struts, as opposed to drywall, are attached to the joists, forming a series of rectangular spaces.
In all such cases, discovery, and repair of such problems to eliminate unintended plenums is difficult due to the hidden nature, limited space, and difficult access of most installed drop ceilings. For highest fire safety, it is best to assume all drop-ceiling and raised-floor airspaces are plenums, whether or not they are officially designated ...
Pressed tin ceiling over a store entrance in Bellingham, Washington, U.S.A.. A tin ceiling is an architectural element, consisting of a ceiling finished with tinplate with designs pressed into them, that was very popular in Victorian buildings in North America in the late 19th and early 20th century. [1]
[citation needed] The third room was previously a proscenium theatre, and was used by the Leicester University Theatre (LUT) society for their performances. [ citation needed ] In 2003, the theatre was converted into the 144-seat University Film Theatre, featuring a projection screen and surround sound system, in preparation of the launch of a ...
U.S. Patent No. 2,984,946 for "Accessible suspended ceiling construction" was granted to Brown who improved on the 1919 patent of Eric E. Hall's interlocking dropped ceiling tiles, with Donn Products' system of "slabs, panels, sheets or the like positioned on the upperside of, or held against the underside of the horizontal flanges of the ...
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