If skyscrapers represent modernization and urbanization, the steel structure is one of its notes.

June 13, Yuanda Group Co., Ltd. can be built on an ambitious, in its official website officially announced its ambitious high-rise plan "Sky City", will use the seven months up to 838 meters in Changsha construction of the world's tallest building. Moreover, this high-rise steel structure will be constructed as factory assembled, duration shorter than a lot of high-rise, triggering the industry on the renewed interest in steel high-rise buildings.

April 13, China construction steel industry in 2012 the General Assembly held in Shaoxing, Zhejiang, more than 500 people gathered in the steel industry, "solid steel housing industry to promote research" was listed as 2012 is the prime objective.

Steel housing as the "21st century green house", steel impact the urban environment is one of the smaller structures, has been widely used in developed countries. The development of green building is to solve our energy problems important strategic resource, steel residential green building is one of them.

Residential development in the promotion of steel on the road, China's relevant departments have been doing the appropriate effort. Such as the Ministry of Housing and Urban-Rural Development has issued a series of policies to encourage the development of residential steel for steel structure residential development has laid a solid foundation.

In addition, the steel also promote the development of the housing industry, and promote the upgrading of products supporting parts and industrial development, has multiple purposes.

　　
　　Steel structure high-rise lofty dreams　　
　　

"'Sky City' formal plan announced around August." Lofty can be built in the press release said. According to the design scheme, total height 838 m 220-story building will use about 20 million tons of steel, is a fully-fledged steel building.

Broad Broad Technology Group can be built is a wholly owned subsidiary, was founded in March 2009, specializes in earthquake of 9 degrees, five times the energy, 20 times the purification, 90% factory-built, and 1% construction waste and sustainable buildings.

Yuanda Group News Affairs Officer Zhulin Fang, the "Sky City" and the previously released "air city" is the use of sustainable building technologies. Although the shape is very similar, but the design and planning aspects of the latter there are a lot of improvements compared.

Ambitious core technology can be built is all steel modular construction, this technology has been developed more mature. Yuanda Group, the relevant responsible person said: "The seven months' time is all steel module assembly time, which is part of the program is not difficult to do this kind of high-rise buildings is not really focused on the difficulty of building materials management module organizational aspects. "

"Burj Dubai by the designer, using modular ambitious sustainable building materials, 95% complete engineering facility in lofty, one day install five layers." The plan formulation.

　　
　　60% recyclable　　
　　

In fact, China's steel building has been very widely used in the building.

Steel structure is defined by the combination of steel and high-strength steel wire made ​​of steel frame connections, and steel building is made ​​with steel bearing, environmentally-friendly, lightweight, energy-efficient building envelope materials to do. Compared to conventional reinforced concrete structures, steel has high strength, light weight, good seismic performance, high degree of industrialization, short construction period, less environmental pollution and plasticity of other advantages.

China Construction Metal Structure Association vice president, secretary Liu Zhe said that after the removal of steel construction, 60% to 70% of the material can be recycled, undoubtedly saving resources, reducing construction waste, in line with requirements of circular economy. From another perspective, the construction of steel buildings steel equal to the national reserve a lot of iron and steel resources.

Structural steel buildings are excellent skeleton and materials, wall energy, satisfy functional, minimal impact on the environment, providing people healthy and comfortable space, and can be life-cycle of the building to meet the concept of sustainable development . This concept, in line with the development of energy efficient buildings and province sustained and healthy economic development requirements in high-rise buildings, residential buildings can play to their own advantages.

　　
　　Shorter duration 1/2 to 2/3　　
　　

Steel building high degree of industrialization, all components can prefabrication production, standardization in the field installation, can improve construction efficiency, shorten the construction period, steel building steel-concrete building energy than the average shortening 1/2 to 2/3 of the Time; architectural precision can be achieved by a change centimeters to millimeters, to avoid causing uncontrollable site construction quality defects and significantly improves the quality of construction; same time, to reduce the construction site of the wet work, to avoid damage to the environment.

December 7, 2010, China's first national steel housing industry base in Zhejiang Hang Xiao Steel Corporation inaugurated the system of China's steel housing industry matured.

Hangxiao developed with steel housing supporting the "three plate system," namely interior wall panels, wall panels and slabs, steel housing industry to meet the development needs of the steel housing "high, large, light," the unique advantages be fully tapped.

"The use of steel structures residential construction, as opposed to traditional buildings, steel buildings in energy conservation, environmental protection, thermal insulation, thermal insulation, building life and other issues have a very distinct advantage." Hangxiao chairman Single Silver Wood representation.

Development of steel residential housing industry is the development of our country one of the paths. Since 1994, China's Shanghai North Cai built in the first 8-layer steel residential buildings, has been in the past 18 years. August 1999, the State Council forwarded the "on promoting the modernization of housing industry, improve housing quality Several Opinions" clearly a development of the housing industry to go the way of economic development cycle, walk industrialization and standardization of the road.

Promotion steel housing is gaining momentum, the construction sector have introduced a number of policies: In 2001, the former Ministry of Construction issued the "Steel residential construction industry Technical Guidelines", the former building of the Ministry of Science and Technology Department has also organized 40 steel Residential building system structure and key technology research topics of research, development, pilot projects; 2005, the former Ministry of Construction promulgated the "National steel structure housing the national standard map"; 2009 China's first "Steel Residential Design Code" was promulgated . October 1, 2010, issued by the Ministry of Housing and Urban "light steel structure housing Technical Specification" officially implemented.

Throughout the process of the housing industry in developed countries, has undergone three stages. The first phase, the establishment of industrialization of residential construction system, improve production efficiency, accelerate the process of residential construction; second stage, the housing industry is focused on improving the quality of housing and residential properties; third stage, to enter into the construction stage of sustainable development, focus to energy efficiency, reduce material consumption and recycling of resources. At present, China is in a residential building from the first phase to the second phase of the transition period.

China Construction Metal Structure Association Building Committee, deputy director Hu Yu Steel Division pointed out that not only the steel building materials can be recycled, reused, reducing construction waste emissions, but also because of its structural seismic performance, in our high-rise residential construction and other public facilities should be Priority promotion.

　　
　　Driven by new materials change　　
　　

According to the relevant agencies to Taiwan's "9.21" earthquake building damage Statistic: reinforced concrete structure was 52.5%, 24.1% brick, steel only 0.6%; steel building City Hall in Kobe, Japan experienced a Hanshin largely intact after the earthquake, and the adjacent 8-storey reinforced concrete building has been severely damaged, one of which was crushed, the upper three layers overall collapse.

Long been engaged in steel technology research professor Yuan Weixia that "in addition to seismic effect, the steel housing can be recycled, combined with thermal insulation, waste utilization development of new wall materials, energy-saving way to achieve the goal."

Steel housing system is easy to achieve industrial production, standardized production, with matching wall materials can adopt energy-saving, environmental protection, new materials, renewable reuse, therefore steel structure house kits and technological research will greatly promote the housing industry of rapid development.

HU Yu Branch, due to facilitate the formation of a stable independent steel structure, internal and external wall materials to promote the use of new energy-saving panels, developed doors and windows, glass enclosed insulation function with new materials, specifications conducive to the development of standardized integral kitchen system, you can use fly ash and other industrial waste, or a variety of beautiful and practical development of new combinations of materials.

"Through the promotion of steel structure house, drive new materials, new processes of change, gradually reduce sand, cement dependence, and ultimately promote China's construction sector to achieve circular economy, environmental protection and sustainable development objectives." Hu Yu Branch stressed.

　　
　　Breakthrough　　
　　

State advocates building land-efficient housing, and the relevant steel housing design specifications and supporting technologies, materials basically have. If China completed 600 million square meters per year of 5% of urban residential buildings with steel, according to multi-layer, high-rise building steel 50 kilograms per square meter basis, steel consumption will reach 1.5 million tons per year.

To this end, in the "second five" first year, China Construction Metal Structure Association, the Ministry of Housing and Urban Housing Industrialization Promotion Center jointly established the "Steel housing industry research group" to study the application of steel construction problems and find solutions, in order to promote the application of steel pace.

Although steel has many benefits, but at present its development in China is still not satisfactory. Our so-called green building policy refers only to energy-saving building walls, solar energy, etc., while the steel skeleton and materials almost no mention. This has led many large steel structure of the bulky and weird.

China Construction Metal Structure Association, Yao Bing said: "Steel is not to say to a large body mass, or to be more steel, but that steel should be reasonable, not the steel building steel structure built bunkers."