Thorpe, William Henry · London, E. & F.N. Spon, limited; New York, Spon & Chamberlain · leaf 176
by itselfto work mischief—^may bevery damaging when alliedwith so powerful an agentas running water. The enduring characterof even the roughest classof masonry arch, if onlythe material be good andabutments stable, is shownwhen it becpmes necessary to destroy old work of thischaracter. Fig. 92… … 162 THE ANATOMY OF BRIDGEWORK. small piece of the arch remained, when the length finallybroke up and dropped. Arches have commonly a greatreserve of strength ; tunnel linings are, indeed, often badlyout of shape, closed in, and sunken; yet continue, with closewatching, and occasional repairs where…
Bridges
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