Английская Википедия:Gibraltar Road–Waterway Canal Bridge
The Gibraltar Road–Waterway Canal Bridge is a bridge located on Gibraltar Road over the Waterway Canal in Gibraltar, Michigan. It was listed on the National Register of Historic Places in 2000.[1][2]
History
The Wayne County Road Commission paved a section of Gibraltar Road in the early 1930s, and constructed a number of new bridges, including this one, during the project.[3]
Description
The Gibraltar Road Bridge is a reinforced-concrete cantilevered-arch bridge[3] measuring Шаблон:Convert long and Шаблон:Convert wide, with a span length of Шаблон:Convert and a roadway width of Шаблон:Convert.[2] A concrete balustrade with urn-shaped spindles flanks the roadway.[2]
The bridge itself is of a rare cantilevered concrete arch design.[4]Шаблон:Unreliable source? The traditional arch bridge design requires a complete arch; in contrast, the cantilevered arch design is divided into two structurally independent half-arches which are each cantilevered from one side.[4] A slab is suspended between the two cantilevered sections; in the Gibraltar Road Bridge, this section is 9 feet long.[4] Close inspection of side walls of the bridge reveals two seams marking the end of the cantilevered arms.[4]
After construction, the Wayne County Road Commissioners noted that "this low sweeping arch bridge is in keeping with its surroundings and is one of the features which make Gibraltar Road so attractive."[3]
See also
References
External links
- Middle Gibraltar Road Bridge from HistoricBridges.org: Multiple photographs of the bridge
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- National Register of Historic Places in Wayne County, Michigan
- Concrete bridges in the United States
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- Cantilever bridges in the United States
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