Sir Norman Foster's new Hong Kong International Airport, the largest in the world, is 516,000m2 and 1.27km long. Approximately the size of Soho, it is the largest enclosed public space ever built. On completion of the second phase, the total area will be 550,000m2.
At the peak of construction there were 21,000 workers on site. The building required 370,000m3 of concrete, while the contracts for steel, glass, stone and moving walkways were the biggest in the history of building contracts. All materials had to be delivered by boat.
It is estimated that the airport will eventually handle80 million passengers pa - more than the combined capacity of Heathrow and jfk.
Two of the world's largest mobile cranes were used to erect the 36m square roof bays - four times the size of those at Stansted Airport.
The Automated People Mover system will be able to carry 5270 passengers per hour each way. Capacity will eventually be 17,500 per hour. It runs in a tunnel which is as wide as a motorway and deep as a two-storey building.
There are 12,000 smoke detectors throughout the building, and 20,000 voice/data outlets connected by 1300km of cable.
The total area of the lightweight steel vault roof is 18ha.