A consortium involving Belgian contractor Besix and Italy’s Rizzani de Eccher has been selected by the Norwegian road authority, Nye Veier (New Roads), to build a 1.3-km-long bridge to carry a four-lane motorway over Lake MjÃ¸sa.
Uniquely, the bridge involves "extensive use of wood" as well as traditional concrete.
Nye Veier said using wood in a "grid support solution" will cut the weight of the superstructure by 17% compared to an all-concrete bridge.Â
It will also reduce the scope of the bridge’s foundation, thus further cutting CO2 emissions and cost.
The wooden motorway bridge was proposed by the consortium, which also includes Norwegian contractor AF Gruppen, the designer and consultant Multiconsult, and architect Knut Selberg.
As well as the bridge, the consortium will build an 11-km section of motorway to make up part of Nye Veier’s E6 Moelv-Roterud link.
The consortium’s bridge-and-road contract is priced at $272.4m (2.55 billion NOK).
The bridge bridge will carry a four-lane motorway over part of Lake MjÃ¸sa (Courtesy of Besix)
"It is incredibly nice for the Inland that the motorway bridge that will tie the county together is both forward-looking and modern," said Ã˜yvind Moshagen, Nye Veier’s development director.
"With the use of wood in a unique and new collaborative structure with concrete, the bridge will have a low carbon footprint," he added.
Norway’s transport minister Knut Arild Hareide said the concept "may be important for future development projects in transport".
Besix said the bridge would be "a major landmark for the region".
Nye Veier picked the proposal on 3 June following an international tender. The parties are now drawing up a contract, with work possibly starting in August.
Top image: Using wood will cut the weight of the superstructure by 17% compared to an all-concrete bridge (Courtesy of Besix)
After working on metallic and non metallic structures for over 37 years then I would like to see the calculations that prove a wooden motorway bridge would be able to be used over a minimum 30 year life let alone longer.
At first it looks like a move in the right direction but although Norway is very green internally they are the 7th biggest exporter of oil and gas in the world and are therefore one of the biggest polluters in the world. Add to this that they have over 1 trillion $ in assets but are still drilling for more and more oil and gas then the picture doesn’t look to rosy! They can afford to build bridges like this because of all the polluting they are carrying out around the world. Cut gas and oil exploration and make a REAL difference.
Have any studies been carried out regarding the useful lifetime and typical annual maintenance costs of this structure as compared to one made of more traditional materials?
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