Kruunusillat, or Crown Bridges, is a large-scale traffic project that, when completed, will benefit numerous districts of Helsinki. The project includes three bridges designed for tramway, bicycle and pedestrian traffic, with a total length of approximately 2 kilometres. The longest of them, the approximately 1200-metre-long Kruunuvuori Bridge, is the longest bridge in Finland. Even on a global scale, bridges of this size have not been built solely for public transport, pedestrian and cycling use.
Date: October 2021- December 2023
Customer: Crown Bridges consortium
Delivery description: beam element for temporary bridge, bridge mouldings, buckles for supporting columns
Location: Kruunuvuori Bridge, Helsinki
More information: Antti Rytkönen, +358 40 672 5033, email@example.com, Anssi Koivumäki, +358 40 822 5255, firstname.lastname@example.org
The Kruunuvuori Bridge will be built by the Crown Bridges consortium, which consists of Kreate Oy and YIT Suomi Oy. Sepa and Kreate have collaborated on several similar, albeit smaller, projects. On that basis, it was also natural to start the construction of the Kruunuvuori Bridge.
For Sepa, we were on the verge of a unique project – a construction site bridge delivery of this size has never been carried out in Finland before, and the size and schedule of the project were also record-breaking. Sepa built a special machine line at the factory to ensure the required production capacity.
Kreate’s Site Manager Mika Huhtala was involved in the construction of the substructures of the Kruunuvuori Bridge. The size of the project is indicated by the fact that while bridge construction projects are typically completed within a year, the subsurface phase alone now lasted a year and a half.
Due to the demanding bridge structure, the project began with the intensive construction of two construction site bridges. For these construction site bridges, Sepa supplied beam elements for these temporary bridges. Mika Huhtala says that Sepa has performed its demanding part of the project flawlessly.
“Goods were delivered efficiently since the bridge was constructed five days a week, day and night. In three months, we built 650 metres of work bridge at sea, as well as so-called bays around the intermediate supports, where pipes could be up to 40 metres long.”
Huhtala praises the logistics for working well with Sepa. Goods arrived at the construction site exactly when they were supposed to, so that the work proceeded smoothly without unexpected surprises or waits.
“When working below sea level, surprises happen more often, but now we managed without anything bigger. With Sepa, everything went smoothly. They responded to requests whenever it was needed, and they handled everything well.”
“All in all, the bridge mouldings were dimensionally accurate, and a project like this requires flexibility from all parties to succeed. Sepa’s response and reaction was always exemplary. Situations were resolved quickly; solutions were found, and the necessary measures were taken to rectify any issues.”
Ville Lehtonen, Kreate Oy
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