The air ventilation of a parking garage and a large road tunnel underneath the Lehrter Bahnhof will be provided by a 60 m high vent stack with a discharge cross section of 30 m². The freestanding steel structure is built by three vertical shear walls rotated 60° to each other. Every shear wall is stiffened by steel frames and crosswise installed tension rods. The space between the frames is filled with translucent glass blocks. Foto: Müller Offenburg

Height: 60 m
Base area: approx. 30 m²