The concept for the "Fünf-Höfe"-project of the Hypovereinsbank Munich (architects: Herzog & de Meuron) consisted of a huge sphere (diameter: 10m) made out of polished stainless steel strips hanging in one of the inner courtyards. The geometrical pattern of the strips refers to a complexe mathematical system known as the Ammann-lines. Due to several technical and logistic problems the whole sphere had to be constructed on the roof alongside the inner courtyard. For that purpose a special underframe with a tower and a sphere made out of steel had to be designed and constructed. Then, the workers had to weld the strip parts together while climbing on the underframe. After the completion of the outer sphere the inner framework was removed. A huge crane positioned the sphere in the inner courtyard approximately 3m above the heads of the pedestrians.

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HypoVereinsbank München
Viscardihof, Fünf Höfe, München

Dr. Switbert Greiner, Oberaichen
Bo Ewald, Kopenhagen

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