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Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed ...
The 40/4 chair is the compactly stackable chair designed by David Rowland in 1964. Forty chairs can be stacked within a height of 4 feet (120 cm), giving the chair its name. Over time it has received a number of design awards and is in the permanent collection of the Museum of Modern Art in New York, as well as other museums internationally.
The type of wood depends upon the final piece, including function, style, and quality. Where parts of the frame are visible afterward, wood grades and species may be mixed. Hardwood destined for upholstery frames is primarily air-dried. [2] Hardwood frames for high-end furniture are often constructed from kiln-dried mixed hardwoods.
Chair, c. 1772, mahogany, covered in modern red morocco leather, height: 97.2 cm, Metropolitan Museum of Art (New York City) A chair is a type of seat, typically designed for one person and consisting of one or more legs, a flat or slightly angled seat and a back-rest.
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In addition to the 32 mm standard, there are other but less frequently used systems (System 25, ip20 etc.). [ 1 ] [ 2 ] [ 3 ] The system allows reconfigurable shelf placement and spacing. The system was developed by fitting, machine and furniture manufacturers, and serves to standardize both component dimensions and production processes.
There is little evidence that the dimensions of these early racks were standardized. Telephone equipment racks (1923) The 19-inch rack format with rack-units of 1.75 inches (44.45 mm) was established as a standard by AT&T around 1922 in order to reduce the space required for repeater and termination equipment in a telephone company central ...
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