The Herøysund bridge will be built in Herøy municipality in the Nordland county. The construction works will start in January 2023, and the bridge will be ready for use in autumn 2024. The bridge becomes part of the county road 828 and replaces the Herøysundet bridge, which was completed in 1966. The decision to build this new bridge was due to bad conditions of concrete of the Herøysundet bridge. The new bridge will ensure a safe and permanent road connection between the main islands of Sør and Nord Herøy. In addition to the bridge construction itself, the project consists of the conversion of the county road 828 in Silvalen and Herøyholmen.
The final bridge configuration was selected from three alternatives at concept phase and has the advantage of no construction within the sea channel and maximises off-site fabrication of the superstructure.
The bridge is a slender composite steel-concrete rigid frame structure with a central arch spanning 75m and two 30m end spans giving a total bridge length of 135m. The sailing height will be 9 metres, compared to 12 meters today. The bridge will be located right next to the existing one, in the southeast. When the new bridge is put into use, the old one will be demolished.
The superstructure will be built in steel, while the foundations will consist of concrete. In order to have the 200-tonne superstructure installed, the steel structure will be transported on a barge.
Bridge design and structural engineering during all design stages. Team and design management. Technical assistance during construction. BIM coordination. 100% delivery with BIM models.