The main building of the HU is being repaired in sections according to the listed monuments during normal operation. An essential part of the measure is the building's fire protection. Drywall work on the ground floor to top floor of the Nordkopf component is to be offered.

The main services are walls, facing shells, parapet and shaft cladding and suspended ceilings in office and meeting rooms, sanitary blocks and corridors.

The suspended ceilings are partly designed as fire protection ceilings under steel stone ceilings.

Fire protection cladding of steel girders is sometimes required.

- 425.00 m 2nd Walls;

- 60.00 m 2nd Facing shells (shaft walls);

- 175.00 m 2nd Facing shells (in front of MW walls);

- 170.00 m 2nd Parapet and shaft cladding;

- 50.00 m 2nd Train path closures;

- 700.00 m 2nd Suspended ceilings;

- 20.00 m 2nd Unsupported blankets;

- 80.00 m 2nd Acoustic suspended ceilings;

- 120 m raised ceilings;

- 100 inspection hatches;

- 30 m 2nd Fireproof clothing steel girders;

- 200.00 m 2nd Dry screed.