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Ceiling

TLDR: A ceiling is the top part of a room that covers the roof or floor above. It can be decorated with artwork or frescoes, and there are different types of ceilings like dropped ceilings and cathedral ceilings.

A ceiling is the overhead surface in a room that covers the upper limits of the space. It's like the roof of a room, but on the inside. The main purpose of a ceiling is to hide the structure of the roof or the floor above, and it's not considered a structural element itself. Ceilings can be decorated in various ways, with artwork or frescoes, especially in religious buildings. They can also be the upper limit of a tunnel.

The most common type of ceiling is a dropped ceiling, which is suspended from the structure above. It's made up of panels of drywall that are attached to the ceiling joists or layers of plywood. This type of ceiling allows for pipework or ducts to be run above it, and insulation and fireproofing material can be placed in the gap. Another type of dropped ceiling is a suspended ceiling, which uses aluminum struts instead of drywall. Cardboard panels are placed inside the spaces between the struts, making it easier to access the pipes and insulation behind the ceiling.

There are also other types of ceilings, such as cathedral ceilings, which are tall ceilings similar to those in churches. Concave or barrel-shaped ceilings are curved upward for visual or acoustical purposes. Coffered ceilings have recessed square or octagonal panels. Coving is often used to link the ceiling to the surrounding walls. Ceilings can also play a role in reducing fire hazard, and there are systems available to rate the fire resistance of dropped ceilings.

In summary, a ceiling is the top part of a room that covers the roof or floor above. It can be decorated with artwork or frescoes, and there are different types of ceilings like dropped ceilings and cathedral ceilings. Ceilings can also have practical purposes like hiding pipes and insulation or reducing fire hazard.

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