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 242
high and 20 feetwide. For so large an area, a double box of thesame type will be more economical. Figure 53 is a culvert of the same dimensions asFigure 52, with solid concrete side walls, bottomcobblestone pavement, and roof reinforced with dou-ble lines of 60-pound track rails, united with…
Bridges, Concrete · Culverts
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