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  2. Dropped ceiling - Wikipedia

    en.wikipedia.org/wiki/Dropped_ceiling

    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.

  3. Ceiling - Wikipedia

    en.wikipedia.org/wiki/Ceiling

    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.

  4. Suspended ceiling - Wikipedia

    en.wikipedia.org/?title=Suspended_ceiling&...

    Retrieved from "https://en.wikipedia.org/w/index.php?title=Suspended_ceiling&oldid=36198199"This page was last edited on 22 January 2006, at 08:37 (UTC). (UTC).

  5. Plenum space - Wikipedia

    en.wikipedia.org/wiki/Plenum_space

    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 ...

  6. Troffer - Wikipedia

    en.wikipedia.org/wiki/Troffer

    A troffer is a rectangular light fixture that fits into a modular dropped ceiling grid (i.e. 2' by 2' or 2' by 4'). Troffer fixtures have typically been designed to accommodate standard fluorescent lamps (T12, T8, or T5), but are now often designed with integral LED sources.

  7. Tin ceiling - Wikipedia

    en.wikipedia.org/wiki/Tin_ceiling

    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]

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