Sandö Bridge, Arch bridge in Kramfors Municipality, Sweden.
Sandö Bridge is a reinforced concrete arch bridge over the Ångerman River between Lunde and Klockestrand, via Sandö. It consists of two sections: the 811-metre-long "Stora Sandöbron" and the 277-metre "Lilla Sandöbron". Its main arch has a free span of 264 metres and rises 48 metres above the water. The pale grey-beige concrete structure has a flat deck supported by evenly spaced vertical columns above the arch.
Construction finished in 1943, with the completed structure holding the world record as the longest single-span concrete arch bridge at that time. The project was marked by tragedy when the temporary formwork collapsed in 1939, resulting in 18 worker deaths.
Kramfors became a city in 1947 and took a bridge into its city coat of arms, referring to the Sandö Bridge. At the south abutment, Wästerlunds konditori has stood since the 1940s, and near the bridge is a monument to those who died when troops opened fire on a demonstration march at Ådalen in 1931.
The bridge serves as a passable road crossing that once functioned as part of the E4 European route until 1997, when traffic was redirected elsewhere. Visitors can traverse it on foot or by car to experience the views and observe the engineering design from different vantage points.
For several years after completion, this was the world's longest single-span concrete arch bridge, demonstrating the capabilities of Swedish engineering expertise. The fact that it was later incorporated into the regional coat of arms shows how deeply it became woven into local identity.
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