"The Signal Box Auf dem Wolf in Basel, of 1994, contains the electronic equipment for a railway engine depot. The six-story building consists of a concrete shell insulated on the exterior and wrapped with approximately eight-inch-wide copper strips that are twisted at certain places in order to admit daylight. While the copper creates a dynamic architectural skin, its functional role is to provide an electrostatic shield." --http://www.moma.org/expansion/charette/architects/herzog_meuron/selected...