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Ganter Bridge is a reinforced concrete road bridge which is the longest spanning bridge in Switzerland, located along the Simplon Pass road in the canton of Valais about south of Brig.〔Billington, 1983, p.260〕 It was designed by renowned Swiss civil engineer Christian Menn and completed in 1980. The overall length is with a main span of , and a maximum tower height of . The bridge's form consists of an S-curve high above the Ganter River, at an elevation of about above sea level. Two main towers and five smaller piers support a total of eight spans with lengths of , , , , , , , and . The longest span between the two towers is straight, while the remaining spans lie along curves with a radius of . Its unique design, combining elements of a cable-stayed bridge and a prestressed cantilever hollow-box girder bridge, with triangular concrete walls above the roadway which contain the prestressed cable-stays, has been awarded many prizes. This hybrid type of cable-stayed and girder bridge is sometimes referred to as an extradosed bridge. == References == * Billington, David P. ''The Tower and the Bridge''. Princeton University Press, Princeton, USA, 1983. ISBN 0-691-02393-X * Billington, David P. ''The Art of Structural Design: A Swiss Legacy.'' Princeton University Art Museum. Princeton, USA, 2003. ISBN 0-300-09786-7. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ganter Bridge」の詳細全文を読む スポンサード リンク
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