The system AT 740 FR has succeeded in developing a construction for the highest demands, from an established system. Thus, effective fire resistance and smoke control as well as an appealing glass and frame construction are not contradictory. In addition to using the profiles from the base system and the corresponding accessories is the waiver on coolant a strong argument for this system. The processing is therefore very simple and different hardly from a standard door. Leaf dimensions of approx. 1450 x 3000 mm are possible without any problems.