Shanghai Securities Exchange Building,
The Exchange Building occupies 100,000 square metres of floor space in two 28-storey towers. Costing approximately $130 M US, it features a 2,800 square metre column-free trading floor at the 5th floor.
The externally expressed steel work incorporates a six storey deep truss spanning 63 m clear between the towers.
Built in extremely poor soil conditions with a water table 1 metre below grade, and three levels of underground parking, the substructure consists of an 800 mm thick slurry wall and a 3 metre thick mat foundation on driven concrete piles.
The construction to grade is of reinforced concrete, while composite steel construction was used above grade because of its lightness and structural efficiency, except for the cores of each tower which are built of reinforced concrete.