[[File:Inspiration Ave Bloody Tanks bridge from N 1.JPG|thumb|A Luten Arch bridge in Miami, Arizona, built in 1918]]
A '''Luten arch''' is a patented concrete arch design for bridges, designed by Daniel B. Luten, of Indianapolis.<ref name=Fraser>{{cite web|url=http://www.azdot.gov/highways/EPG/EPG_Common/PDF/Technical/Arizona_Historic_Bridge_Inventory/Long_Inventory_Forms_Gila_3.pdf |title=State of Arizona Historic Bridge Inventory |author=Clayton B. Fraser|date=October 31, 2004}}</ref>{{rp|3}} Luten was awarded more than 30 patents for his improvements of the Luten arch design.<ref name=sha/>{{rp|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.{{citation needed|date=June 2011}}
The Luten Bridge Company was one seller of the designs. The Topeka Bridge & Iron Co. was a western seller of the designs.<ref name=Fraser/>{{rp|3}}
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.<ref name=sha>P.A.C. Spero & Co. and Louis Berger Associates (1995), [http://www.sha.state.md.us/OPPEN/IX-CABr.pdf 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.</ref>{{rp|142}}
==References== {{Commonscat|Luten arch bridges}} {{reflist}}
Category:Luten bridges
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