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Lighting and structural infrastructure for light rail projects: a specifier’s guide
A tramway or light-rail line is, structurally, a long series of poles. They carry the overhead contact line that powers the vehicles, they light the corridor, and in urban and landmark settings they help define how the route looks. Specifying them well means treating the pole not as a catalogue item but as part of an integrated infrastructure system. (See: UITP light rail and tramway guidelines)
This guide walks through the main pole families used on light-rail projects, the trade-offs of combining functions on a single structure, and the practical considerations — from materials to delivery — that a specifier should plan for.
Poles and supports in a light-rail system
A typical light-rail corridor combines several structural roles: overhead catenary system (OLE) supports that carry and tension the contact wire; combined poles that carry both the overhead line and street lighting; and, on bridges or in city centres, decorative poles engineered to an architectural profile.
Each role implies different loads and geometry. Catenary poles must resist the tension and dynamic forces of the overhead line; lighting functions add cantileveredluminaire loads; and decorative requirements can drive custom cross-sections.
Combining functions on one structure
Wherever possible, combining the tram overhead line and street lighting on a single pole reduces the number of structures in the corridor, cleaning up the streetscape and simplifying foundations and civils. The trade-off is engineering complexity: one structure now has to satisfy the loads and clearances of both functions simultaneously, and coordination between the lighting and the traction design becomes essential.
When this is done well, the result is a cleaner corridor with fewer obstructions — a frequent objective in modern urban tram schemes.
Materials, durability and finishing
Rail corridors are demanding environments: exposure to weather, de-icing salts and, in coastal cities, salt spray. Hot-dip galvanizing provides the foundation for long-term durability. Where colour, architectural requirements or enhanced protection are needed, Valmont applies a Duplex system combining hot-dip galvanizing with a paint coating, specified according to the corrosivity category of the environment and supported by FROSIO-compliant surface preparation and coating processes. In landmark and bridge settings, however, durability alone is not enough. Support structures become part of the visual landscape, requiring corrosion protection and architectural integration to be considered together from the outset.
A specifier’s checklist for light-rail poles
Alongside the obvious structural inputs, a light-rail pole package benefits from planning the following early:
- Loads and geometry for each pole family (catenary, combined, decorative).
- Applicable standards, wind zone and clearances.
- Corrosion protection and finish matched to the environment and the design intent.
- Prototyping of any custom or first-of-type poles before series production.
- Delivery logistics: numbering, pre-assembly and installation-ready sequencing for the construction site.
Valmont on real projects
On the Kruunusillat tramway projectin Helsinki, Valmont company Tehomet Oy supplied the tramway and urban infrastructure poles along the route — around 300 tapered tubular poles shared between the tram overhead line and street lighting, plus custom decorative poles on the Kruunuvuorensilta bridge. Valmont’s Mass Transit range covers Tramway Poles & Supports and Rail Lighting for projects of this kind.
- Who are the leading manufacturers of tramway and light-rail poles in Europe?View
The European market includes several specialist pole and structure manufacturers. Valmont — with its Tehomet Oy – A Valmont Company brand — supplies tramway poles, catenary supports and rail lighting for light-rail projects across the region, including combined tram + lighting poles and custom decorative poles for landmark settings such as the Kruunusillat tramway in Helsinki.
- Can one pole carry both tram catenary and street lighting?View
Yes. Combined poles that carry both the overhead contact line and street lighting are widely used to reduce clutter in tram corridors. The structure must be engineered to satisfy the loads and clearances of both functions at once, which requires coordination between the traction and lighting designs from the outset.
- What is involved in supplying poles for a light-rail project?View
Beyond the structural design of each pole family, a light-rail package typically involves matching corrosion protection and finish to the environment, prototyping any custom or first-of-type poles, and planning delivery logistics — numbering, pre-assembly and installation-ready sequencing — so poles arrive ready to erect in the right order.
Planning a tramway or light-rail project? Contact the Valmont Structures engineering team to specify the right poles and supports for your corridor.
