The building is 660 metres long, 65 metres wide and 45 metres high. It was built above the existing long-distance railway station, elevated on 84 columns. It has a direct connection to the lower long-distance railway station and is linked to terminal 1 of Frankfurt Airport via a connecting passage. It houses a hotel, shops and modern office space as well as areas for events and conferences.
After four years of construction, THE SQUAIRE, formerly known as «Airrail Center», was completed in 2011.
BCL was responsible for the construction logistics planning, for the updating of this and for the execution of construction logistics.
Special challenges: access for delivery traffic was only possible via the A3 motorway; in addition, construction work was carried out while the long-distance railway station was in operation.