Since the autumn of 2002 a transparent glass roof stretches over the East-West rail of the new main station in Berlin. The second filigree roof covering the North-South rail is now receiving final touches. Instead of historic station’s purlins an efficient shell structure spans between cable girders. The entire roof as well as the cable spanned facades demanded high skills in structural design and detailing. Numerous special constructions, extensive tests and finally the field erection during regular railway service were great challenges for all the people involved.