An investigation of a Strauss trunnion bascule bridge
A 1912 University of Illinois engineering thesis by Reuben Lawrence Sandberg analyzing a Strauss trunnion bascule bridge, written for faculty examiners and civil engineering readers. Halftone photographs mounted on dark board show the raised counterweighted lift span over a river and close-ups of bolted trunnion castings, paired with hand-drawn ink truss diagrams annotated with panel loads and dimensions; useful for riveted-steel lattice silhouettes, drafted line work, and plate-style framing.
