 | Bridges - 1837 - 360 pages
...sufficient support for the weight or pressure of the arch-stones, without any sensible change of form throughout the whole progress of the work, from the...springing of the arch to the fixing of the key-stone. It should be capable of being easily and safely removed, and designed so that it may be erected at... | |
 | John Weale - 1850 - 590 pages
...support for the weight or pressure of the arch-stones, without any sensible change of form taking place throughout the whole progress of the work, from the...springing of the arch to the fixing of the keystone : it should be capable of being easily and safely removed, and designed so that it may be erected at... | |
 | Thomas Tredgold - 1885 - 412 pages
...sufficient support for the weight or pressure of the arch-stones, without any sensible change of form throughout the whole progress of the work, from the...springing of the arch to the fixing of the key-stone. It should be capable of being easily and safely removed, and designed so that it may be erected at... | |
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... corresponds to the intended concavity of an arch. When the piers or abutments are carried up to the height designed for the springing of the arch, the next object is to set up the centre, the proper construction and erection of which may well be considered... 