The work included the demolition and renovation of fire dampers containing asbestos and their replacement. Furthermore, new ventilation ducts and fire protection work were carried out. All work was carried out in accordance with TRGS 519. The work was carried out under very cramped installation conditions in installation shafts, confined spaces, WCs and stairwells during ongoing operations with heavy public traffic, in two shifts and in weekend shifts.

The skilled and knowledgeable staff of the G+H Group were able to complete the well-prepared work within one month.