Schlaich Bergermann Partner (stylized sbp) is a nationally and internationally active structural engineering and consulting firm with headquarters in Stuttgart, Germany and branch offices in Berlin, New York City, São Paulo, Shanghai and Paris.The firm also has its own department for the development of technologies of solar power generation and employs consulting engineers for renewable energies.For a facade of nearly seamless transparency, parallel cable assemblies span horizontally and vertically in between the sides of the building volumes as well as in between the roof girders and floor of the Kempinski Hotel at the Munich airport.Further examples of this principle are some of the many soccer stadiums worldwide (such as in Berlin, Frankfurt am Main, Cologne, Warsaw, Kapstadt, Durban, Port Elizabeth, and Johannesburg).One of the first permanently moveable membrane roofs was the one across the bullfighting arena in Saragossa, Spain, which can be closed and opened like a flower within minutes.The only things lighter are structures made of air: the pneumatic pillows of the Arenas Nîmes and Madrid change seasonally within a couple of days or, depending on the weather, within a few minutes.The cast steel allows for the production of geometrically complicated pipe nodes and an optimal alignment to the load distribution.