A sectional steel structure is to be installed as the load-bearing substructure of the rafter roof component D; Component A1 installed in the roof of a steel substructure for the installation of ventilation unit; Installation of tubular frame reinforcements in the area of drywall pretexts in component B incl. In all sub-areas development of the work and assembly planning.

- load-bearing substructure of the rafters roof component D: assembly of approx. 1.5 t profile steel construction in the attic of component D;

- Installation of a steel substructure for the installation of a ventilation unit in the roof, component A1: Installation of approx. 2.75 t profile steel construction, approx. 10 m 2nd Grate cover; approx. 10 m three-part tubular frame railing and approx. 2.2 m high access stairs;

- Installation of approx. 125 m tubular frame profile reinforcements 100 x 80 x 8 mm in pre-wall constructions by the drywall trade.