A Luten arch is a patented concrete arch design for bridges, designed by Daniel B. Luten, of Indianapolis.:3 Luten was awarded more than 30 patents for his improvements of the Luten arch design.:141
The Luten arch improves upon preceding concrete arch designs by strategic use of reinforcement where needed to address tension of load upon the bridge. This enables bridges to be considerably lighter.
According to Luten, by 1919 he had designed more than 17,000 Luten arch bridges, and there were examples in all but three US states.:142
- Clayton B. Fraser (October 31, 2004). "State of Arizona Historic Bridge Inventory" (PDF).
- P.A.C. Spero & Co. and Louis Berger Associates (1995), Concrete Arch Bridges, in Chapter IX of Historic Highway Bridges in Maryland: 1631-1960, Historic Context Report, Maryland State Highway Administration, Maryland Department of Transportation, Baltimore.
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