Nussbaumer: These tasks are no longer possible without at least partial separation of the func-tions. By integrating an engineering floor after each five use stories in
the Swisstower we make it possible to separate building services and user areas,
in part from the primary structure as well. This aspect is not taken into sufficient consideration - with devastating effects: Today essentially intact buildings are torn down because adaptations are hardly possible due to a failure to separate the
structures.

Moser: Flexibility also means additional costs. Making a building truly flexible costs money. Secondly: Flexibility can also be a consequence of weakness when it comes to making a deci-sion. It is not always easy to tell the difference.

Holl: Do you still have a daydream that is waiting for a competition in order to have a chance of realization?

Moser: Yes. What we still want to realize in any case is the tower, the Swisstower, the sky-scraper. In the interim this project has also continued to develop in our imagination. Originally, in the middle of the nineties, the point was to upgrade a problem area in Zurich. Building bridges and forming links were the priority. But what good is a beautiful bridge if the other bridgehead is not of interest. This gave rise to the basic idea of making the other side, the neglected one, more attractive. With a

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