Concrete bridges and culverts, for both railroads and highways (1909)
Tyrrell, H. G. (Henry Grattan), b. 1867 · Chicago The M.C. Clarke publishing co. [etc.] · leaf 243
ng used by several of the rail-road companies and are economical. They have adisadvantage, however, in requiring the use ofcurved forms, but this is overcome to some extentby using collapsible centers. A modification of this form of culvert using asemicircular top, is also shown in Figure -57.…
Bridges, Concrete · Culverts
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