049 Signal Box Auf dem Wolf

Plans and models of the project, for which no sketches were preserved, highlight the almost graphic linear structure of the copper strips – tight at one point, twisted at another – forming the outer shell of the signal box. The serial construction of the railroad tracks is translated into a filigreed facade, symbolically expressing the electronic functions of the building. First attempts show that the copper strips were bent open to allow recognition of the floors at the windows. The models underline the spool-like character of the copper wrapping with the additional vertical wrappings. However, due to technical reasons this could not be realized.

The copper strips are bent open increasingly with the help of spacers; the computerized operation requires only a small support staff.

The interchanging wrapping gives the outside of the signal box a vivid, sculptural appearance. Its material develops a highly sensual quality.

The copper strips are bent open increasingly with the help of spacers; the computerized operation requires only a small support staff.

The signal box Auf dem Wolf, depending on the perspective, appears to visitors as a monolithic, seemingly floorless, filigree building entering into contact with the railroad tracks as well as dominating them and putting them into relation with the surrounding high buildings of the adjoining quarters. At night, the interior light shows the floor structure through the windows. The copper surface, depending on time of day, light, and weather conditions, takes up varying colors and tactile qualities. The light copper shade is meanwhile covered by a dark patina, juxtaposing the noble box with the unpretentious tracks.

If rain has washed away the dust, it shimmers in a velvety dark green. Under a light blue winter sky or nightly illumination the signal box radiates a neonlike strangeness, removing it mysteriously from any touch. Making this protean quality experiencable in time and space is one of the major qualities of Herzog & de Meuron’s designs.