The building, which is in building class 5 and is an unregulated special building, will be extended by an additional floor during ongoing hospital operations. To avoid long construction times, the extension will be constructed as a fire-retardant wooden structure with a high degree of prefabrication and quick installation times. Vertical access takes place via an internal staircase, supplemented by an external steel staircase which connects all floors with common rooms and acts as an additional structural escape route. The escape routes were designed in accordance with the legal safety cascade.