Francis C. Lowthorp
Francis C. Lowthorp (1810–1890) was a prominent US civil engineer and designer of iron truss bridges. Among his earliest designs was a railroad bridge across the Delaware River at Easton, Pennsylvania, connecting the Lehigh Valley Railroad with the New York Central Railroad and the Belvidere and Delaware RR.[1]
He subsequently designed numerous other bridges, including some Pratt-truss type bridges using cast iron for compression and wrought iron for tension members (see entry for William Cowin).