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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. Soffit - Wikipedia

   en.wikipedia.org/wiki/Soffit

   underside of office ceiling of tiles (often gypsum) suspended, fastened or bonded to a grid system attached to the walls and/or ceiling: false/suspended ceiling (tiles/grid) or dropped ceiling: underside of an arch or architrave (whether supported by piers or columns) underarches lower (usually false) ceiling area to mask and allow egress of ...

4. 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 ...

5. Chicago Metallic Corporation - Wikipedia

   en.wikipedia.org/wiki/Chicago_Metallic_Corporation

   In 1951, DAMPA developed the first perforated metal ceiling in the world. In 1959, the company's name was changed to Chicago Metallic Corporation. In the 1970s, in collaboration with a Danish shipyard, the DAMPA Marine Ceiling Systems were developed, which were the most successful new product launch in the 1970s. [citation needed]

6. Ceiling - Wikipedia

   en.wikipedia.org/wiki/Ceiling

   A ceiling can also be the upper limit of a tunnel. The most common type of ceiling is the dropped ceiling, [citation needed] which is suspended from structural elements above. Panels of drywall are fastened either directly to the ceiling joists or to a few layers of moisture-proof plywood which are then attached to the joists. Pipework or ducts ...

7. 25 of the very best deals from Nordstrom's Half-Yearly Sale ...

   www.aol.com/lifestyle/the-very-best-deals-from...

   One of the best post-Christmas sales we look forward to every year is Nordstrom's Half-Yearly Sale, which typically kicks off the day after Christmas and lasts for a couple of weeks.Ring in the ...