The new construction for the suspension of the clean room ceiling and the TGA loads at +5.39 m and +6.39 m is planned as a steel construction. The +5.39 m and +6.39 m levels are formed using sheet metal profile gratings. The new steel structure is a self-supporting, braced structure and is not connected to the reinforced concrete supports. The steel structure is braced via roof and wall bracing. The structure is founded on individual foundations. In order to transfer the horizontal forces from earthquakes, the forces are transferred to the new floor slab via shear studs. For detailed information on the structural system, see also Chapter IV "Explanation of the calculation model" of the structural calculations.
The airlocks are designed as separate, "self-contained" steel structures made of rectangular hollow sections inside the hall. Bracing is provided by the frame design. No loads are transferred to the roof and supporting structure of the actual hall construction.