Take Hangzhou Qianjiang Century City talent special space for example.
This project is consists of 16 high-rise buildings with 28 to 40 layers, 2 floors underground, and total construction area of 660,600 square meters, of which 430,800 square meters on the ground, underground 229,800 square meters. All are made of steel structure green construction system. It has a good anti-seismic performance; Basic cost can be saved because of the housing light weight. Fast speed of construction, short construction period, small wall thickness, high construction ratio, clear and bright space, flexible layout, save a large number of labor and improve social efficiency because of the high degree of industrialization. Produce less energy consumption, reduced the pollution to the environment of the dust, sewage, and noise. Reduce energy consumption, high resources circulation utilization rate, green environmental protection because of the energy-saving wall body. It achieves the unity of economic benefit, social benefit and environment benefit. Specific analysis is as follows:

 

Obvious comprehensive cost advantages: the ground buildings (accounted for about 2/3 of the total area) increased by 12.1% compared with concrete, but the foundation and underground basement (about 1/3 of the total area) decreased by 22.65% from the cost of concrete. Therefore, this project comprehensive cost is basically the same as the cost of concrete. With labor tensions and rising labor costs, the general social economic benefit will be more obvious.

 

Shorter construction period: Steel structure construction period is 350 days less compared with the concrete construction, saving a total investment about 10% of the financial cost (about $ 100 million).

Increase of underground parking spaces: increase 655 underground parking spaces, increase by 16.6%, according to market 200,000 yuan for each parking meter, the income will be 130 million yuan.

 

Reduction in carbon emission: the integrated carbon emissions of steel structure building cycle is reduced by 36.8% compared with concrete.

Resource saving: This project construction weight is only 1.02 tons /㎡, compared with the primary concrete whose weight is 1.59 t / ㎡, reduced by 35.84%. Construction template consumption reduced by 88.6% and forest resources are saved. Conscientiously implement the goal of sustainable development "environmental friendly and resource-saving".

 

Recycling: The main building material is recyclable, construction waste reduce by more than 60%.

Reducing environmental pollution: the water consumption of factory production, fabricated construction, and construction reduce by 70%, waste water, dust and noise reduced by more than 80 %.

 

Industrial waste recycling: succeed in resource utilization of coal ash, tailings quartz sand, gypsum and other industrial waste in the new-type composite wall.

Indoor room rate increase: because of the concrete filled steel tubular column reduction, the thickness of excellent performance composite wall reduction and so on, the effective use of the indoor area increased by an average of 5.8%.

 

Basement Clear height space saving: effectively save the space below the beam where the concrete wiring because of steel beams containing web to save 40 cm underground space.

Earthquake-resistant ability improvement: reasons like the excellent ductility, anti-seismic energy performance of steel structure, the construction weight reduction and so on, greatly reduce the risk of the building fragile damage, and effectively ensure the “no collapse in earthquake” goal.

 

Facilitate Units secondary transformation: no load-bearing walls indoors, flexible layout, incorporating small apartment into large units as required.