Trafikverket (the National Transportation Authority) had to increase the drainage capacity for the motorway and therefore needed to construct a depository where rain water from the road is contained and purified before it is released and led to lake Mälaren.

© Johan Fowelin

Architects: ON Arkitekter

Location: Solna, Sweden

Project Year: 2016

Photographs: Johan Fowelin

On Arkitekter Team: Petra Mann, Filipa Reis, AnnaMaria Berggren, Anna Berglund, Fredrik von matern.

Engineering And Technical Consultants: WSP

© Johan Fowelin

From the architect. Trafikverket (the National Transportation Authority) had to increase the drainage capacity for the motorway and therefore needed to construct a depository where rain water from the road is contained and purified before it is released and led to lake Mälaren.
© Johan Fowelin

Conditions
NS24 is different from most other rain water depositories in the sense that it is placed above ground, in a slope. It is clearly visible from the surroundings, not least from Rörstrandsgatan in Stockholm. Therefore, the city of Stockholm made strict claims regarding the design of the building.

© Johan Fowelin

Design
The façade panels are mounted between horizontal belts of weathering steel with slightly angled frontal edges and contours which vary from floor to floor. Planting wires are taut between the belts, forming an irregular su...