Kruunuvuorensilta Bridge
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Kruunuvuorensilta Bridge: Delivering Custom Tramway and Lighting Structures for Helsinki's Landmark Bridge.
Location
Helsinki, Finland — Kruunuvuorensilta Bridge (connecting Korkeasaari and Kruunuvuorenranta)Context
Crown Bridges (Kruunusillat) - a ~10 km light-rail line connecting eastern Helsinki to the city centre; a car-free bridge for trams, cyclists and pedestriansSupplier
Tehomet Oy - A Valmont companyScope
~300 standard tubular-profile poles on the mainland + ~100 custom angular special-profile design poles on the bridge, with a custom luminaire hidden inside the arm structureBridge
Kruunuvuorensilta — ~1,191 m long, 135 m diamond-shaped pylon; Finland’s longest and tallest bridgeDelivery
2023 - 2025Milestones
Opened to pedestrians & cyclists on 18 April 2026 (50,000+ visitors opening weekend); tram service from 2027Project Partners
Design: WSP · Contractor: NRC Group Finland · Bridge architecture: Knight Architects
About this project
The Kruunuvuorensilta bridge — the centrepiece of Helsinki’s new Crown Bridges (Kruunusillat) light-rail connection project — has opened to pedestrians and cyclists, marking a milestone in one of Finland’s most ambitious urban-mobility projects, designed to reshape how people move throughout the city.. At approximately 1,191 metres long, with a 135-metre diamond-shaped pylon, it is Finland’s longest and tallest bridge and a new landmark on the Helsinki skyline. Tehomet Oy - a Valmont company supplied the tramway and urban infrastructure poles along the route — both standard tubular poles and custom-designed decorative poles engineered specifically for the bridge environment.The challenge: tramway and street lighting poles at scale
The Crown Bridges is a roughly 10-kilometre light-rail line connecting the eastern districts of Helsinki to the city centre, built as a car-free corridor for trams, cyclists and pedestrians. A key challenge of the Crown Bridges project was to deliver a lighting infrastructure that combined durability, functionality and architectural coherence across both the mainland route and the landmark Kruunuvuorensilta Bridge. Along the route, Tehomet Oy - a Valmont company supplied both traditional round tubular poles on the mainland and custom angular design poles on the Kruunuvuorensilta bridge itself — respectively around 300 standard tubular-profile poles and around 100 special-profile design poles.Engineering a custom profile from scratch
The angular, ready-made profile required for the bridge poles did not exist as a standard product. Tehomet Oy - a Valmont company therefore manufactured steel materials for the project itself, engineering the special profile specifically for the Crown Bridges environment. The luminaire used in the poles was also designed for the project. It had to be concealed within the pole’s arm structure while, despite its small size, still meeting a sufficient lighting class — a requirement solved jointly by the structural and lighting design.
Prototyping and testing before series production
Before series production, Tehomet Oy - a Valmont company manufactured prototypes of the special poles, which were inspected both at the factory and during on-site lighting reviews, confirming performance before the main deliveries began.Manufacturing, numbering and installation-ready delivery
Deliveries ran from summer 2023 to just before Christmas 2025. Cooperation with the contractor was fine-tuned down to the smallest details: the poles were numbered, packaged and pre-assembled according to requirements, and Tehomet Oy - a Valmont company provided installation instructions for the special poles to support smooth, efficient installation on site.Related products and projects
- Tramway Poles & Supports
- Rail Lighting
- Decorative Poles – Steel
- Large Masts
- Related insight: Designing multifunctional poles — tram catenary + street lighting on one structure
- Related insight: Lighting and structural infrastructure for light rail projects
- Related project: Scheveningen Boulevard coastal lighting masts
FAQs
Project FAQs
- Who supplied the poles for the Crown Bridges tram line in Helsinki?View
Tehomet Oy - A Valmont company supplied the tramway and urban infrastructure poles for the Crown Bridges light-rail project in Helsinki — both standard tubular poles along the route and custom-designed decorative poles for the Kruunuvuorensilta bridge.
- What kind of poles are used on the Kruunuvuorensilta bridge?View
The bridge uses custom angular, special-profile design poles — around 100 of them — engineered specifically for the project, each with a custom luminaire concealed inside the pole’s arm structure. On the mainland, around 300 standard tubular-profile poles were installed.
- How many tramway poles were installed for the Crown Bridges project?View
Close to 400 in total: approximately 300 standard tubular-profile poles on the mainland and approximately 100 special-profile design poles on the bridge.
- When did the Kruunuvuorensilta bridge open?View
It opened to pedestrians and cyclists on 18 April 2026, welcoming more than 50,000 visitors over the opening weekend. Tram services are scheduled to begin in 2027.
