ceiling

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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

Ceiling

The undercovering of a roof or floor; generally concealing the structural members from the room or roof above, or the underside surface. It may have a flat or curved surface, and be self-supporting, suspended from the floor above, or supported from hidden or exposed beams.

exposed ceiling

A ceiling in which all the structural and mechanical systems are left exposed, either in their natural state or painted.

false ceiling

A ceiling suspended or hung from the floor above, which hides the underneath structure and provides a space for the mechanical systems, wires and ducts.

luminous ceiling

A system in which the whole ceiling is translucent with lamps that are installed above and suspended from a structural ceiling.

suspended ceiling

A nonstructural ceiling suspended below the overhead structural slab or from the structural elements of a building and not bearing on the walls.

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

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 number a ; 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.

ceiling

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

ceiling

i. The height above the ground or water of the base of the lowest layer of cloud below 6000 m (20,000 ft), covering more than half the sky (ICAO). The term also refers to the vertical visibility in a surface-based layer that completely obscures the whole sky, whichever is lesser.
ii. The highest pressure altitude that can be reached by an aircraft, excepting a zoom climb. At this altitude, the aircraft rate of climb is zero. Also called absolute ceiling.
References in periodicals archive ?
Under the current interest rate ceiling, the maximum APR would be 28%.
Interest rate ceiling is a combination of fixed and floating interest rates.
POVERTY: A statutory interest rate ceiling in the UK, in line with most other European countries, to protect the poorest families from exploitation by credit companies and loan sharks.
impose a statutory interest rate ceiling in the UK, in line with most other European countries, to protect the poorest families from exploitation by credit companies and loan sharks.
I believe that the ECB should keep its targeted interest rate ceiling at its current level, while allowing exceptions for such special shocks as the price of oil.
In addition, to the extent that a government program is not funded, MBA recommended the legislation should increase the interest rate ceiling so that the subsidy offered in today's interest rate environment is comparable to that of 1942.
The new law carries a clause obliging the Diet to review the interest rate ceiling after three years in view of potential business difficulties small shoko lenders may face as a result of the cutback in the binding upper interest limit.
The deals are regulated by the Consumer Credit Act 1974 which has no interest rate ceiling.
In South Korea, 14 banks were suspended, the interest rate ceiling was raised and measures were taken to liberalize financial markets to make it more market-driven and less susceptible to political intervention or corruption.
The discount rate, the rate the Fed charges commercial banks and what Arkansas usury law ties the interest rate ceiling to, has been raised three times.
At such times, banks raised the rate that they paid on large CDs, circumventing the Regulation Q interest rate ceiling on other deposit sources of funds.
States were selected to represent: (1) states with a restrictive interest rate ceiling structure (2) states where interest rate ceilings are moderate, and (3) states where interest rate ceilings are not restrictive.