Cross-section of the new city hall in Zutphen (Architects: Rau & Partners Amsterdam).
The spiral form was constructed in our own studio in Utrecht
The stainless steel construction, in which we have placed the ball bearings afterwards.
Under the floor you can see the canals of the ventilation system , which go to all the parts of the city hall.
Placing the column. Outside the building a crane was used, inside a hand-cart was sufficient.
The first curved glass has been placed.
photos: Joop de Vries, Utrecht
Inside the column, seen from above: An alpinist cleaning the glass from inside.
