Highway bridges and culverts
A 1911 U.S. Department of Agriculture Office of Public Roads bulletin by Charles Hamilton Hoyt and William H. Burr, issued in Washington as practical guidance for county engineers and road builders. Halftone photographs of steel truss spans, timber falsework and masonry abutments alternate with line plates of contour surveys, profiles and stress diagrams, giving lattice girder patterns and engineering drafting conventions.


















