The Waddell "A" Truss Bridge is standardized truss bridge design that was first patented in 1893 by prolific civil engineer John Alexander Low Waddell. The design provided a simple low-cost, high-strength solution for use by railroads across the United States and Empire of Japan for short spans of around 100 ft (30.5 m). According to the Historic American Engineering Record (HAER), "beyond its role in the growth of railroad transportation, the "A" truss is perhaps most historically significant when viewed within the context of Waddell's career and the emergence of the American bridge fabrication industry into international marketing."
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| - Waddell "A" Truss Bridge (en)
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| - The Waddell "A" Truss Bridge is standardized truss bridge design that was first patented in 1893 by prolific civil engineer John Alexander Low Waddell. The design provided a simple low-cost, high-strength solution for use by railroads across the United States and Empire of Japan for short spans of around 100 ft (30.5 m). According to the Historic American Engineering Record (HAER), "beyond its role in the growth of railroad transportation, the "A" truss is perhaps most historically significant when viewed within the context of Waddell's career and the emergence of the American bridge fabrication industry into international marketing." (en)
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| - For a number of years the author was dissatisfied with all railroad bridges for spans between the superior limit of the plate-girder and a length of
about one hundred and fifty feet, ordinary pin-connected through-Pratt trusses being too light and vibratory, and the riveted bridges as then built being clumsy, unscientific, and uneconomical. (en)
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| - The Waddell "A" Truss Bridge is standardized truss bridge design that was first patented in 1893 by prolific civil engineer John Alexander Low Waddell. The design provided a simple low-cost, high-strength solution for use by railroads across the United States and Empire of Japan for short spans of around 100 ft (30.5 m). According to the Historic American Engineering Record (HAER), "beyond its role in the growth of railroad transportation, the "A" truss is perhaps most historically significant when viewed within the context of Waddell's career and the emergence of the American bridge fabrication industry into international marketing." (en)
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