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An older, less common type of dropped ceiling is the concealed grid system, which uses a method of interlocking panels into one another and the grid with the use of small strips of metal called 'splines', thus making it difficult to remove panels to gain access above the ceiling without damaging the installation or the panels. Normally, they ...
Each story contains vinyl dropped ceilings, suspended from the floor slabs above and divided by metal strips into a grid. [51] [47] [52] Artificial illumination is provided by cathode-ray tubes above the ceiling panels. The panels served to diffuse the light so the tubes could not be seen from below, thereby giving the impression that the ...
An example of a catenary-shaped suspended structure is the Eero Saarinen designed Dulles International Airport. The roof of the structure is made up of suspension cable which stretches across angled concrete columns. In the design of Dulles airport, the floor, the columns and the roof all work together to allow the walls and ceiling to float. [6]
Armstrong World Industries, Inc. is a Pennsylvania corporation incorporated in 1891. [2] It is an international designer and manufacturer of wall and ceiling building materials.
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. Troffers are typically recessed sitting above the ceiling grid, but ...
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