Structural Features
The project will consume 270,000 tons of steel. For its assembly factory, sustainable building technology and independent research and development will be required. The main advantages of the building will be reflected in its earthquake resistance, energy saving, cleanliness, durability, and materials, which consist of recycled building materials, non-aldehyde / non-lead / non-asbestos building materials, etc. The technology at the core of the whole steel structure is modular construction. The building would have 6 inches (15 cm) of insulated walls and quadruple glazing, contributing greatly to energy efficiency. The building will be designed to be resistant to earthquakes of up to 9.0 on the Richter Scale.
Although structural details are not available, outside architects have expressed doubts that a modular design would have the stiffness on lower floors to withstand the wind loads imposed by such a height, without unacceptable amounts of sway, or that the building could be built without high-strength concrete, whose curing time would preclude such a rapid construction rate. Most of the construction and production of materials will take place on site so as to benefit the local economy of Changsha.
A cost estimate of $1500 per square meter of floor space would make Sky City considerably cheaper than the similarly tall Burj Khalifa ($4500 per square meter). The total cost is also considerably less, with the Burj requiring about £940 million ($1500 million) in 5 years, compared to Sky City's £400 million ($625 million) in 90 days. Broad Sustainable Group has purchased 67,300 m2 (724,000 sq ft) of land, for a cost of 390 million yuan ($63 million).
Read more about this topic: Skycity
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