Fyrtornet
Malmö, Sweden

Architect

Wingårdhs

Engineering

knippershelbig

The Fyrtornet is Sweden’s tallest timber office building. It features a central access core made of glued laminated timber (glulam). At 51 m tall, the Fyrtornet is not only Malmö’s first office building to be constructed entirely from solid timber, but also the tallest structure of its kind in Sweden. Located in the southern part of the city, it forms part of the “Embassy of Sharing” district development. This 11-storey building is considered a milestone in sustainable construction, with the entire structure above the ground floor made of wood. The stiffening core, including the stairwells and elevator shafts, was also constructed from solid timber. In addition to modern office spaces, the building accommodates a city library and various communal areas.

As timber buildings are more susceptible to wind-induced vibrations due to their lower mass, binderholz (responsible for structural engineering for timber structures) commissioned knippershelbig to carry out a detailed analysis of the tower’s dynamic behaviour. The aim was to develop structural measures that would ensure compliance with permissible acceleration levels on the upper floors.

Using up-to-date technical literature and analytical methods, knippershelbig assessed the wind-induced vibrations at the top of the tower for different structural design options, and subsequently shared the findings with binderholz. A final wind tunnel test confirmed the previously calculated vibration results.

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Fyrtornet
Malmö, Sweden

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