page_title: Grandfey Viaduct
section_title: Second viaduct
hierarchical_section_title: Grandfey Viaduct / History / Second viaduct
caption_attribution_description: Viaduc de Grandfey, Fribourg (FR)
context_page_description: The Grandfey-Viaduct is on the railway line from Bern to Fribourg and is one of the largest bridges in Switzerland.
context_section_description: With the electrification of the Swiss Federal Railways (SBB) network, the bridge had to be strengthened to carry heavier and faster locomotives and train compositions. The Grandfey Viaduct was rebuilt in a new form from 1925 to 1927 following principles developed by the bridge construction office of the SBB, which had already been realised with the Le Day Viaduct. SBB involved Robert Maillart, the pioneer of large concrete structures in Switzerland, as an advisory engineer. Supported by pillars consisting of iron trusses completely enclosed in concrete, the bridge has six wide concrete arches that are built according to the Melan system, over the top of which runs a pedestrian walkway. The five middle arches have clear spans of 42 m. Long rows of slender arcades that carry the track bed rest on the main arches. The double row of arches gives the large structure a monumental classical form.
  As a result of the construction of the Schiffenen dam, which was completed in 1964, the lower part is now filled by the water of the Schiffenensee.
caption: Grandfey Viaduct of 1927
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