Consulting agency Oslotre was commissioned to build a new six-story high lumber office building in Kristiansand in southern Norway.
The recessed first floor is retail space, and the five floors above are devoted to offices. Scalloped sections of green-painted timber clad the facade and demonstrate the capabilities of timber construction.
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Related: The Largest Wooden Building in Northern Europe
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Lumber 4 is located in an industrial area on the outskirts of the city of Kristiansand. The city is characterized by the very old town, Posebyen, which suffered a terrible fire in 1892. In spite of that, numerous buildings remained intact, being traditional constructions built using half-timbered structures.

The construction of the project was built in a record time of twelve months, this is due to Oslotre’s specialization in wooden structures, which has allowed the project to demonstrate that it is possible to build competitive wooden buildings compared to the same structures in standard concrete and steel techniques. Oslotre acted as architect, interior architect and structural engineer for the project, which was constructed using a composite structure of cross-laminated timber (CLT) and concrete.

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Related: Norway Home to the World’s Highest Wooden Building
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The wooden elements in the interior occupy a prominent place, giving the space a feeling of warmth in winter and freshness in summer.
New Lumber Office Building in Southern Norway, written by Tor Kjolberg
The photography is by Kyrre Sundal and Christoffer Imislund.