Archetech Issue 35 2018 | Page 80

aerodynamic base form with its curves drawn into space through its horizontal structuring is engaged in a dialogue with the curves of the adjacent motorway section. In contrast to the crystalline structure of the neighbouring buildings the project acts as a mediating design element to this transport infrastructure object. The facade is a band double facade offering mobile, wind-protected external solar protection. The colour of the glazed parapets gradually changes from bottom to top so that the building shows a soft colour progression from dark to light grey over its entire height. This optical effect “dematerialises” the building as it rises further up. The building’s internal configuration is largely determined by the need of compact traffic areas and office space allowing for maximum flexibility in organisation. This requires an optimised structural and installation core at the centre with a circumferential, freely usable space. Essential design criteria are related to the claim for a sustainable building, taking ecological factors into account. The building will been certified according to ÖGNI. The focus is on an efficient use of energy, water, and other resources, protection of user health, and a reduction of waste and undesired emissions. For the benefit of energy efficiency the use of passive systems is at the centre to reduce the necessary share in technical systems to a necessary extent and thus keep lifetime costs low. The activated concrete ceilings in the building part function as a