Hoyt, Charles Hamilton, Burr, William H. (William Hubert), 1851-1934, United States. Bureau of Public Roads · Washington : U.S. Dept. of Agriculture, Office of Public Roads : G.P.O. · leaf 28
road bridge atRockville, Pa., which consists of 48 arches, each having a span of70 feet. The illustration shown in Plate IX is made from a working planprepared in the Office of Public Roads for a plain concrete arch-culvert with a 6-foot span, which may be of service more often thanthose of larger… … as I fill 4 3 <? » ni- ■ ill u* k * * a
Bridges Design and construction · Culverts
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