They rise vertically 2m to 3m out of the pavement before they branch out like a tree. These “branches” in turn support a totally free arrangement of steel channels with numerous high and low points. As the two columns in front of the entrance to the office wing are about 3m taller than those in front of the hotel lobby, this entrance gains an additional accent. On plan the canopy consists of 79 different polygons. Each of these panels required a different two-layer ETFE-foil cushion supplied by seele cover. The aluminium frames to the cushions are fixed to lugs that are welded into the channel structure. To prevent overheating below the canopy, the upper layer of ETFE has been printed with a pattern of dots (50% coverage). Rainwater on the canopy drains into the channels and from there to the columns. One “branch” per column serves as a downpipe.