Innovative Wood City 2 office building rising in Helsinki

The towers rising up in Helsinki across from the Clarion Hotel have surely caught the eye of those travelling between Helsinki and Tallinn through Länsisatama. We are performing cast-in-situ and element assembly element works for SRV Rakennus in the Wood City 2 office building and the elevator shafts are about to reach their final height.

Wood City 2 office building is currently under construction in Jätkasaari, Helsinki. With a total area of approximately 8,700 square metres, the last building to be built in the quarter of modern timber buildings of Wood City, it will house the office space of With Secure and F-Secure, both listed on the Helsinki Stock Exchange. The entire Wood City quarter is built mostly in the form of modern timber buildings, and timber also plays an important role in Wood City 2. The exterior and partition walls of the building are made of wood, the load-bearing columns of floors 2–7 are made of glue-laminated timber and the load-bearing parts of the intermediate floors are CLT fibreboard on steel beams and covered with concrete levelling. In the construction of the building, the main contractor and developer SRV has fully followed the new EU taxonomy for reducing the environmental footprint of buildings throughout their life cycle, with particular attention paid to the energy efficiency of the building, the reuse potential of building materials, the flexibility for future change of use, and the vulnerability to possible future climate changes.

Concrete structures and concrete works also play a significant role in the building: in total, there is more than 2,000 m3 of concrete, 6,500 m2 of formwork, more than 300 tons reinforcement works, and approximately 700 concrete elements. Our work includes cast in situ concrete works involving the waterproof exterior walls of the underground parking level, shelters, staircases and elevator shafts ensuring the rigidity of the building, as well as the assembly of the load bearing filigree slab and concrete and steel elements of the ground floor. The basement of the building is built entirely below street level, also below sea level, with the sea located only a few metres away, and the exterior walls of the basement are constructed as watertight, using watertightness materials in the construction joints.

It is an honour that we can contribute to the development of an environmentally sustainable construction, and to see how the reduction of the carbon footprint is being approached in a holistic and constructive way, and the choice of materials is based on rational and reasoned considerations. With the introduction of innovative materials, the place of concrete as a material will continue to be secure in future structures as concrete is water-, noise-, and fire-resistant, load-bearing, and formable. Concrete as a material sequesters atmospheric CO2 during its lifetime, the concrete load-bearing frame allows for flexible future changes of use of the building, and after the end of the building’s lifetime, concrete is largely reusable.

Maru Betoonitööd: we bring our own contribution to the development of the sustainable and environmentally friendly construction industry and the completion of landmarks that beautify the city, while focusing on achieving the clients’ goals.