When planning for the technological building on the premises of the Siemens plant on Balanstraße, creating clean rooms for the manufacture of masks in the microstructural field was of prime importance. The staff building to the east, in the main, accommodates the departments for administration and information. A feature of the top floor is that it is partly executed as a tunnel-shaped glass-house, housing employee amenities. Sun-shading is effected by automatic outside awning blinds.