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Garabit viaduct
The Garabit Viaduct (''Viaduc de Garabit'' in French) is a railway arch bridge spanning the River Truyère near Ruynes-en-Margeride (Fr), Cantal, France, in the mountainous Massif Central region. The bridge was constructed between 1882 and 1884 by Gustave Eiffel, with structural engineering by Maurice Koechlin,〔Loyrette 1985, p.77〕 and was opened in 1885. It is in length and has a principal arch of span.〔Loyrette 1985, p.81〕
==Background==
By the end of the 1870s Eiffel & Cie, the company formed by Gustave Eiffel in partnership with Theophile Seyrig, had an established position among the leading French engineering companies. Between 1875 and 1877〔Maria Pia Bridge〕 the company had built the Maria Pia Bridge over the Douro at Porto, and when it was proposed to construct a railway between Marvejols and Neussargues in the Cantal department the work of constructing a viaduct to cross the River Truyère was given to Eiffel without the usual process of competitive tendering at the recommendation of the engineers of the state Highways Department since the technical problems involved were similar to those of the Maria Pia Bridge; indeed, it was Eiffel & Cie's success with this project that had led to the proposal for a viaduct at Garabit.〔Loyrette 1985, p.77〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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