At the famous tourist destination Kjerag in Rogaland, there is a unique design towers that consists of 3 poles. Statnett is the principal, EFLA was responsible for engineering.
The project's objective
Lysefjord, on west coast of Norway, with its steep mountainsides and spectacular scenary attracts tourists from all over the world. Today, the high-voltage tower stands by the parking lot at Øygardsstølen and are attracting attention.
More than a high-voltage tower
The tower is a collaboration between Widenoja Design and EFLA, where Eva Widenoja is responsible for the design concept and EFLA for engineering. The idea came from the consultation process conducted by Statnett.
The design tower at Øygardsstølen is part of the 420 kV Western corridor project - Stage 2 (between Duge - Lyse - Tjørhom - Ertsmyra - Fjotland).
Find out more about the 420kV Western Corridor project.
Solid anchoring
Stability and safety are an important part of the project. The tower with three poles, at 32, 35 and 39 meters tall, respectively, are exposed to heavy wind and ice loads on the current-carrying lines in long and heavy spans, in addition to the forces of nature on site. It is therefore essential to base the tower in a way that ensures adequate stability throughout their lifetime. Each foundation is anchored with 12 steel bars that go 12 meters obliquely down into the rock. The diameter of the struts is 40 millimetres, and each strut has a tensile design capacity of 82 tonnes, as quoted by NGI, the Norwegian Geological Institute.
Environmental issues
The environment is more than just emissions of greenhouse gases, it is also about the visual. Given that the tower location is so prominent; at a known tourist destination, it was essential to create something attractive, capable of accommodating and hopefully enhancing its environment. We are proud of the result and pleased by the positive response it has received.
EFLA's role
- Electromechanical and mechanical engineering
- Support with analysis of constructability and risk
Cost-effective design
It was important for EFLA to design cost-effectively solution. This was achieved by using established technologies in innovative ways and at the same time considering constructability and safety in the design phase. Close cooperation and follow-up between the producer, architect and project designer is the key to achieving this.
Industrial designer about collaborating with EFLA
Eva Widenoja
"Flexible and open to suggestions, but at the same time very clear on what is possible, impossible or difficult in terms of design solutions. Often proposes alternative solutions where it is needed; they understand the industry and product development. EFLA is not just a "design company". They are serious, clear and keen to do a good job. Really nice to work with."
1 / 2Spectacular scenery and steep mountainsides. Credit: Woldcam - Statnett.
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