The spectacularly individual hung-from-arches form of Ludwig Erhard Haus was derived from a logical exploration of how to enclose the maximum possible building volume, while following Berlin's very prescriptive building regulations to the letter.
Traditional parapets set 22m above the local streets govern the height of any new structures in the district, while the desks of workers in prime office accommodation have to be within 7m of a naturally lit window. The elliptical rib cage structure enabled the building to meet the regulations, while creating a distinctive and very open public area at its heart - which was one of the ambitions of client, Berlin Chamber of Commerce.
Concrete was expected to be the most appropriate material for the arches but the contractor offered steel as a cheaper alternative.
Cost appears to have been a major pre-occupation for the many parties eventually involved on the project. The building was finally fitted out for about £2, 200/m2.