Keilaniemenportti, an ultra-modern office building, will be Finland’s tallest timber building and the tallest wooden office building worldwide within 57m height. Designed for Varma Finnish Mutual Pension Insurance Company to realize creating an innovative and sustainable working environment with low environmental impact.
Keilaniemen Portti, which means “the gate of Keilaniemi”, will be located in the fast-developing business district Keilaniemi in Espoo, Finland, which is home to many of Finland’s largest headquarters and high-rises.
Timber is at the core of the architectural vision. Combined with the sloping green roof, an organic shape with soft curves, and the seaside location, timber use indoors and outdoors will help bringing a sense of nature to the office space, with the aim to improve well-being for the tenants compared to conventional office buildings.
The building is shaped to connect and make best use of its surroundings. The views are open to east towards Keilaniemi waterfront and west towards the bay area of Ostonlahti, while having a sloping green-roof/solar panels oriented south with large terraces opening towards the Espoo/Helsinki archipelago. Along of being made of wood, the building has a 400m long curved silhouette giving it an integral presence as it has always belonged here.
The 20 000 m2 building will house a number of attractive office spaces as well as a conference centre, a restaurant, a panoramic sauna, a scenic rooftop terraces and underground parking spaces connected to the upcoming underground central parking of Keilaniemi.
The structure is a true hybrid structure that utilizes primarily timber for slabs and pillars with steel beams to reduce the over dimensioning of timber when needed. This allowed a reduction of the overall thickness of the intermediate floor and streamlined the design to enable maximum utilization of the floor height. The elevator/staircase shafts are made of concrete to stiffen the structure and allow an efficient use of timber upwards.
The structure is an innovative new technical solution that connects the timber and steel elements together, allowing them to work together as one and efficiently transfer loads to the concrete core shafts. The structure was designed to improve safety during installation by enabling quick and easy assembly.
Work on the building foundation and underground parking is planned to begin in 2021, and the building will be completed in 2024.