The 660-metre-long and up to 55-metre-wide station building was designed by BRT Architects (Bothe, Richter, Teherani). After nearly four years of construction, it was opened in 1999. The entire station is glazed on the outside and appears to be open. The upper deck is at a height of 12.5 metres and is composed of a 30 centimetres thick reinforced concrete slab with an area of about 34,000 square metres. The slab is supported by steel beams, which transfer their loads on to 4.5 metre thick trusses. These span across the railway station with a maximum span of about 50 metres and are 15 metres apart. The trusses are designed to support a building that is up to eight storeys high. The maximum load capacity of the reinforced concrete slab is 700 kilograms per square metre.