The goal is for it to last about 200 years.
On April 18, Helsinki inaugurated a 1.2 kilometer bridge on which no cars will circulate. The bridge it was filled with people almost as soon as it opened, and organizers encouraged visitors to come with crowns, a reference to the name ‘Kruunuvuori’ (literally, crown mountain). Many did. There was music, food stalls, a choir, a samba group and even a bicycle parade. During the opening weekend, More than 50,000 people crossed the bridge. The Kruunuvuori has thus become the longest bridge in Finland, and is designed exclusively for pedestrians, cyclists and trams. It has taken a while to materialize. The project is on the political agenda of Helsinki since 2002although construction did not begin until October 2021. The bridge is part of the ‘Kruunusillat’ (the Crown Bridges) project, a set of three bridges creating a new tram and cycle path corridor to the island of Laajasalo, east of central Helsinki. The Kruunuvuori is the last of the three to be completed, and also the most ambitious. What makes it unique. The bridge connects Korkeasaari and Kruunuvuorenranta, and is the longest and highest in all of Finland. Normally structures of this size are not built only for pedestrians, public transport or cyclists, and in fact there has been a debate for years about whether cars should also circulate there. Daniel Sazonov, mayor of the city, recognized at the inauguration that these large projects usually generate conflicting arguments, although he trusts that the neighbors will integrate the bridge into their daily lives when the tram service starts. In detail. In 2012, as part of Helsinki’s World Design Capital programme, the city held an international competition to design the connection between Kalasatama and Kruunuvuorenranta via Korkeasaari. Of 52 proposals, the jury selected ten, and the winner was the Gemma Regalis projectthe jewel in the crown, a joint work of WSP Finland and Knight Architects. The result is a cable-stayed bridge whose most visible piece is a diamond-shaped pylon 135 meters high, taller than Finland’s tallest residential building, the Kalasatama Tower (134 meters), and significantly higher than the Olympic Stadium tower (72 meters). Construction of the pylon alone required approximately two years of continuous concrete pouring. The design also incorporates details designed for the people who pass through it in their daily lives and adapt its structure to the environment in which it has been built. For example, the route along which its citizens now walk is curved, an idea designed so that the destination can be better perceived. The railings on the south side protect from the wind, and embossed plastic pipes on the cables cause the accumulated ice to break off on its own, a detail that is designed to withstand strong coastal winds and icy winters, when the surrounding sea usually freezes. A large bridge. The Kruunusillat project itself is presented as the longest bridge in the world built exclusively for trams, pedestrians and cyclists. Although no Records organization such as Guinness has yet certified it, the New Atlas media pointed out that has not found any other longer bridge that combines pedestrian lane and light tram (not counting exclusive railway bridges). A bridge with a double objective. The Kruunuvuori Bridge alone represented an approximate investment of 130 million euros. The goal is for tram passenger service to be operational by early 2027 at the latest. Likewise, the distance between Kruunuvuorenranta and the city center goes from 11 kilometers to approximately 5.5 kilometers thanks to this corridor. The project facilitates access for residents of the eastern islands without relying on a private car while also reducing pressure on the eastern branches of the Helsinki metro, in the face of forecasts for population growth in new neighborhoods. Made to last. The bridge It has a projected useful life of 200 yearsa requirement that had not been required before for structures of these characteristics in Finland. This has forced the choice of specific materials, such as stainless steel in the outer layer of the pillar armor in the sea, to resist salt water and freeze-thaw cycles. Cover image | SSAB In Xataka | In 1957, two engineers had a delusional idea: to drill a well 40 kilometers deep offshore.