Publisher's Synopsis
Excerpt from A Treatise on Bracing With Its Application to Bridges and Other Structures of Wood or Iron: With 156 Illustrations on Stone
The first example that is likely to occur to the reader is that of the span drils of Southwark Bridge, but the arch, from its construction and depth of mate rial, is quite independent of additional bracing, and the use of the lozenges of the spandrils is merely to connect the arch with the roadway: thus, the Sunderland bridge, which is of nearly the same span, and of greater rise, and composed of voussoirs of less depth and inferior character for rigidity, is, nevertheless, with out spandril bracing.
A design somewhat similar to the above, represented by figure 19, is some times used for engine-shafts, &c., and its bracing power is, in such cases, brought into action.
Another, and, though insignificant, seemingly a very clear application of the method, is that employed to brace the transverse pipes between the main-chains of the Menai Bridge.
But the most decided case of its employment, in its simplest form, which the author has met with, is that figured in the March part of The Builder of the present year (page 100, vol. It is the wrought-iron roof over the Stras burg Railway Station at Paris.
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