Ceiling (redirected from Usury Ceiling)

ceiling

Overhead surface of a room, and the underside of a floor or roof. Suspended ceilings, which hang from the beams above, are used to conceal construction, mechanical equipment, wiring, and light fixtures. During the Renaissance, ceilings were often coffered (see coffer), vaulted (see vault), or transformed into one large framed painting.

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ceiling

1. the inner upper surface of a room

2. 

a. an upper limit, such as one set by regulation on prices or wages

b. (as modifier): ceiling prices

3. the upper altitude to which an aircraft can climb measured under specified conditions

4. Meteorol the highest level in the atmosphere from which the earth's surface is visible at a particular time, usually the base of a cloud layer

5. a wooden or metal surface fixed to the interior frames of a vessel for rigidity

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ceiling [′sē·liŋ]

(building construction)

The covering made of plaster, boards, or other material that constitutes the overhead surface in a room.

(mathematics)

The smallest integer that is equal to or greater than a given real numbera; symbolized ⌈a⌉.

(meteorology)

In the United States, the height ascribed to the lowest layer of clouds or of obscuring phenomena when it is reported as broken, overcast, or obscuration and not classified as thin or partial.

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ceiling

The overhead surface of a room, usually a covering or decorative treatment used to conceal the floor above or the roof.

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Ceiling 

the overhead inside lining of a room; a group of structural elements forming a secondary covering that is suspended from the roof.

Ceilings’ may be smooth or have projecting ribs, coffers, or other sculptured details. Smooth ceilings may or may not cover beams. They are made from plaster, boards, or sheeting materials. Suspended ceilings are used mainly to provide better sound absorption and to increase the sound insulation of the roof. They also conceal ventilation ducts, heating pipes, and electrical wiring. Such ceilings are used as decorative elements in interior design.

In modern mass-scale housing construction, the smoothing of seams and painting constitute the principal method for finishing ceilings made of slabs and panels. In public buildings, ceilings are more and more often being faced with slab materials having good acoustic properties. Such materials include perforated aluminum panels and porous plasterboard with a sound-absorbent fiberglass layer. In a room whose ceiling serves as an element of interior design, more decorative painted or sculptured finishes are used.

Z. A. KAZBEK-KAZIEV