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See also: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: 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 . |
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