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Timber construction, building safety and performance support

Mjøstårnet – the world’s tallest timber building

This extraordinary timber tower, the tallest all timber structure in the world, uses glue- and cross-laminated wood sourced from sustainable forests – the majority being local – for its primary structure. As a renewable material with low embodied carbon, the use of timber helps to significantly reduce the building’s environmental impact in comparison to other traditional building materials, such as concrete or steel.

Location
Lake Mjøsa in Brumunddal, Norway
Size
16.500 m
Client
HENT AS
Sweco’s role
Building technology, building physics, acoustics, fire design and project management.

Mjøstårnet, situated alongside Lake Mjøsa in Brumunddal, Norway is an impressive multi-purpose building spanning 18 floors and covering 16,500 square meters. It encompasses apartments, offices, a hotel, a restaurant, and an indoor swimming pool. Completed in 2019, this project set a new standard for designing and constructing tall timber structures, emphasising the utilisation of local resources, suppliers, and sustainable materials.

Today, it stands as an important landmark in the local community, symbolising the construction industry’s transition toward greener practices. The structural framework of Mjøstårnet relies on glulam columns, beams, slabs, and diagonals, while the elevator and stair shafts are constructed using solid wood.

To create sustainable cities and communities in the future, we need to invest in using wood as a key building material. In fact, wood is stronger than both concrete and steel in relation to its own weight.

 

Moreover, it is easy to shape and cut. Modern production techniques make it efficient to manufacture and prefabricate. Wood is also readily available and locally sourced, especially here in Norway.

Tor Øistein Andresen Head of Sweco Norway’s timber department

This choice of materials for Mjøstårnet not only reduces the building’s environmental impact, but also creates a pleasant indoor climate and comfortable living environment. The timber façade seamlessly integrates Mjøstårnet with the surrounding forests, enhancing its visual appeal.

Sweco’s engineers have made innovative contributions to the fire safety solutions in the building. In addition to effectively withstanding fire scenarios, the floors and rooms are designed as individual fire compartments to prevent the spread of fire. The building’s rounded pergola is specifically designed to reduce wind resistance. Mjøstårnet is not only a striking, safe, and functional structure, but also serves as a model for constructing a more sustainable future.

We see a significant interest in building with wood and an increasing number of new solutions and types of buildings that can be constructed with wood. New suppliers are emerging, and we’re gaining more experience. The interest is largely driven by a desire to build sustainably, including meeting the requirements of the EU taxonomy.

Kari Ekker Sweco Norway Energy & Environmental Advisor