The Mjösa Tower (Mjøstårnet) has completed in Norway’s Brumunddal, nabbing the title of the world’s tallest wooden building in the process at 85.4 meters high.Mjøstårnet is to be a symbol of the “green shift”, and proof that tall buildings can be built using local resources, local suppliers, and sustainable materials.
The plyscraper was built in two years. The main structure has columns, beams and diagonals in laminated wood. All pieces of wood come from the surrounding areas and are processed just 15 minutes by car from the construction site.
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All the elements are connected through the use of grooved steel plates and dowels, a connection commonly used in bridges and large buildings. Floors 2 to 11 have prefabricated wooden floors, those 12 to 18 have concrete floors, a choice dictated by the need to have more weight on the top to make the building more stable and able to withstand the wind.
The 18-storey structure sits right next to Norway’s biggest lake Mjøsa and is designed by Voll Arkitekter.
The design studio ensured that the materials used are certified to withstand fire from 90 to 120 minutes. There is a water system and the rooms are made of watertight compartments to slow down the spread of a possible fire. The wood visible in the escape routes, the interior walls of the main staircase and elevators are treated with a fire retardant paint.
Lower floors of Mjösa Tower comprise offices and a hotel, with apartments overlooking the lake above.