With an eye to sustainability, the roof of the new EUROSPAR supermarket in Hartberg, Austria, was built using around 2,300 m2 of Kielsteg wooden construction elements. Other factors in the choice of Kielsteg were its elegant appearance, rapid construction and structural performance. The large clear spans result in a shop floor area of circa 1,700 m2, with the stylish natural wooden surface contributing to a smart but relaxing ambience. The flat roof, which is only half a metre high, is constructed so that half of its area can be green. For the building, which is 31.1 m wide with a 5.4 m projecting roof, only one central support axis is needed, with two pillars. The Kielsteg elements that form the front section with the projecting roof are 21.1 m long, and the elements that cover the rear section are 15.4 m long.