Rudiments of the art of building : in five sections : general principles of construction, materials used in building, strength of materials, use of materials, working drawings, specifications and estimates (1871)
of centre 10 rise at the crown, from the great pressure thrown upon the haunches during tlie erection of the arch, renders it necessary to weight the crowns with blocks of stone until it is nearly comi)lcted. Centres of this kind are ahvays costly, afford less facilities for easing, and are in… … slide over each other, may be counteracted in three ways 1st, the arch may be continued through the abutment until it rests on a solid foundation, as in fig. 26 2nd, by build- Fig. 27.
Building · Building materials · Engineering
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