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STAIR (0. Eng. stagger, step, from st...

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Originally appearing in Volume V25, Page 763 of the 1911 Encyclopedia Britannica.
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STAIR (0. Eng. stagger, step, from stigan, to climb, cf. Ger. steigen; the See also:root is also seen in " See also:stile " and " See also:stirrup ")  , in See also:architecture, the See also:term (Fr. escalier) given to a See also:series of steps rising one above the other, either in one straight See also:line or with returns, or See also:round a See also:newel, or open well-hole, either square, rectangular, circular or elliptical . A series of continuous steps is called a " See also:flight." The See also:ordinary See also:staircase of two flights with landing between is known as a " pair "; " two pair back " therefore would be the See also:room at the back on the second See also:floor; in houses where the space occupied by the staircase is very limited there is no landing, but the stairs See also:wind round the corner See also:post or newel, and are known as " winders." The steps of a See also:stair consist of " tread " and "riser," the respective dimensions of which vary according to the importance of the staircase and the space which has been given to it; in See also:external flights or stairs, such as those at See also:Persepolis, the tread is so wide and the riser so small in height as to allow of a See also:horse ascending, and generally in See also:garden terraces there is the same slight rise . For the stairs of a See also:palace or municipal See also:building, 14 in. tread and 5 in. riser would be required, but as a See also:rule 12 in. tread and 6 in. riser is adopted . In the See also:stone staircase in the palace at See also:Cnossus in See also:Crete, the treads were 18 in. and the risers 51 in . In ordinary houses 9 in. or to in. is generally given for the tread, and 62 in. to 7 in. for the riser . In the stairs leading to lofts, and in yachts or steamers, the ascent is much steeper, having sometimes to in. rise and 5 in. tread . The series of stairs provided to ascend from one floor to another when enclosed with walls is known as a staircase (q.v.) . Unenclosed flights of steps placed in front of a building are known by the See also:French term See also:Perron (q.v.), usually applied to a structure like the horseshoe staircase of the palace at See also:Fontainebleau, the stairs of which are carried on a support See also:independent of the See also:main See also:wall of the palace . From this point of view the See also:great return flight of steps at Persepolis might be looked upon as a staircase, because on one See also:side the steps are all embedded in the main wall of the See also:platform . Belonging to the same type are the great flights of steps which led to the successive stages of the Ziggurats or See also:Assyrian See also:stage towers; those in front of the See also:Propylaea, leading to the See also:Acropolis at See also:Athens; the stairs leading to the Propylaea (150 ft. in width) at See also:Baalbek; others in See also:Palmyra; and generally all the See also:Roman temples . In See also:medieval times should be included the great flights of steps which stood in front of the cathedrals of See also:Europe, some of which, as those at Le See also:Puy in See also:France, Ste Gudule at See also:Brussels, the See also:cathedral at See also:Erfurt in See also:Germany, S . Miniato at See also:Florence in See also:Italy, and others, still exist, not having yet been buried by the See also:gradual raising of the ground-level in great towns; also the immense flights of steps in See also:Rome, leading up to the Trinita del See also:Monte and the Capitol, and those found in all towns built on hills, when an architectural See also:composition has guided their See also:plan .

In See also:

Egyptian architecture inclined planes took the See also:place of stairs, as in the sloping corridors of the Great See also:Pyramid, the descent leading to the See also:temple of the See also:Sphinx, and the approaches to the two temples of See also:Deir el-Bahri, one of them the See also:oldest temple found . Inclined planes were also provided in front of some of the See also:Greek temples, where the steps of the See also:stylobate were of great height; similar contrivances were adopted by the Mahommedans in See also:Egypt to ascend the See also:minaret of See also:Ibn Tulan and el Hakim; in the great circular See also:tower at See also:Amboise, and in the fallen campanile of St See also:Mark's, See also:Venice . (R . P .

End of Article: STAIR (0. Eng. stagger, step, from stigan, to climb, cf. Ger. steigen; the root is also seen in " stile " and " stirrup ")
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