30-story building built in 15 days...in China, this is amazing.

Source: http://nextbigfuture.com/2012/01/china-broad-group-constructs-30-story.html

JANUARY 07, 2012

China Broad Group constructs 30 story building in 15 days

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We have been closely tracking China's Broad Group and their prefabricated factory mass produced 'Can be Built' skyscraper technology. Six months ago they had earthquake certified a scale model of their 30 story building. now they have built an actual 30 story building in 15 days at the end of 2011.

China's Broad Group site for their Can Be Built technology is here

This is one of the key technologies to watch for the next decade or two. The reason is the construction methods use far less cement and are more energy efficient. They will also enable faster urbanization of the developing world (not just China.) With state backing Broad Group will have this technology in use for more high rise commercial construction by 2020. This is part of the mundane singularity of technologies that mostly exist now and can high impact on the world.

The buildings are five times more energy efficient in operation and use about 6 times less cement.

They plan to build one hundred and fifty 30-story apartment building, hotel, office plans using the new system. They have started building a 1.33-million-square meter “NO.1 Sustainable Building Factory” and it will be able to produce 10 million square meters of mass produced skyscrapers (about 100 million square feet) each year. The 30 story building is 183000 square feet so the factory can produce about 500 of the 30 story building each year and many more factories will be built.

The Changsha Broad Air Conditioning Company has unveiled designs for the 200-storey Sky City tower, a sustainable mixed use project. At 666 meters tall, the building will house 1.2 million square meters (12 million square feet) of space for residential apartments, retail, offices, restaurants, schools and a myriad of other facilities. The building will be manufactured in a factory and assembled on the construction site. Additionally, the tower will have the capacity for 70,000 to 110,000 residents. It will use 400 kilograms (1000 pounds of material) per square meter). 480,000 tons of building. Even with reducing the occupancy by half so that units are 1320 square feet instead of 660 square feet the amount of material is 12 tons per person for 40,000 people. The Broad Group building also includes offices and retail shopping. Instead of being 6 times more efficient with material it is more like 8-10 times, since it is replacing 72 tons of house and the extra buildings for offices and shops. It is 20 times more efficient if the higher occupancy levels are used.