Steel structure has been widely used in foreign construction industry. In developed countries, small high-rise, high-rise steel structure residential is very common. Type steel column, H steel reinforced concrete column, square tube steel column, round tube column and steel pipe concrete column are more; H type steel is generally used for beam; high strength bolts or welding or both are used for the connection of beam column nodes. The floor slab is generally cast-in-place composite floor slab of steel bearing plate, and the enclosure structure mainly adopts light energy-saving standardized prefabricated wall panel. Fire prevention is mainly covered with fireproof coating or fireproof board. At present, steel structure housing is more popular in industrialized countries. Steel frame houses in Australia and Japan account for 50% of the number of houses, while steel frame houses in the United States account for about 20% of the total number of houses. Finland, Sweden, Denmark and France have formed a considerable scale of industrialized steel structure housing system. Due to the continuous improvement of human cultural life, the requirements for high-rise and large-span buildings are getting higher and higher. The steel structure itself has the unique advantages of light weight, high strength and fast construction, so it is very ideal for high-rise and large span, especially super high-rise and super large span. At present, the tallest and largest structures in the world use steel structures, and the venues of the previous Olympic Games also use steel structures. Several pure steel structure buildings that have been built in the world are the tallest super high-rise buildings in the world. They are:

The 102-story, 381-meter-high Empire State Building in new york, USA, built in 1931 (it was the highest until 1969); The 110-story, 417-meter-high World Trade Center in new york, USA (north and south) built in 1969;

The 110-storey, 443-meter-high Sears Tower in Chicago, USA, built in 1970. The 450-meter-high Malaysian Twin Towers Oil Building (KLCC, which claims to be the highest in the world at present, but the Sears Building in the United States has objections) was built in 1996;

At present, in the industrialized countries such as the United States and Japan, construction steel accounts for more than 50% of the total steel consumption, steel structure accounts for more than 30% of the steel output, and steel structure area accounts for more than 40% of the total construction area. At present, the steel consumption for construction in China only reaches 22% ~ 26%, and the steel used for steel structure construction is less than 2% of the total steel output in the country.

Of the 101 super high-rise buildings in the world, 59 are pure steel structures. More than 60% of foreign high-end residential use of steel structure. The most prominent advantage of steel structure building is energy saving and environmental protection, which is a "dark horse" in the world construction field ". However, China, as the country with the largest building volume and the largest steel output in the world, the development of steel structure housing is obviously lagging behind. The gap between China's steel structure and developed countries also reflects the huge development space of China's steel structure system. In the next 30 years, the rapid growth of population and the acceleration of urbanization process provide a broad space for the development of the civil housing market. However, the traditional construction of low production efficiency, serious damage to the environment and arable land, to the economic development has brought a great burden. Therefore, in the new round of residential construction, energy-saving and land-saving green steel structure housing will face new development opportunities.

The Shanghai Jinmao Tower built in 1997 has 95 floors, with a building height of 421 meters and a structural height of 395 meters, which is also among the highest in the world. If the Shanghai Pudong World Financial Center Building (95 floors and 460 meters) is completed, it will be the highest in the world and will be a great honor for our country. Shenzhen Saiger Plaza Building has 70 floors and a height of 279 meters. It is the tallest super high-rise building in the world that uses concrete filled steel tubes. This is another great honor for our country.

In March 2002, a steel structure residential building with 18 floors and H-shaped steel was constructed in Maanshan City, Anhui Province. It is an important symbol of China's housing industry from reinforced concrete to steel structure mode. At the same time, there are six steel structure high-rise residential buildings under construction in Shanghai. Eventually, they will be built to 100 meters and 34 floors, which is the first time in China. Beijing residential also used steel structure, located in Chaoyang District Shilibao morning home B area, all H-shaped steel beams, steel columns. Beijing Jincheng Apartment, which opened in September 2002, fills the gap in the steel structure system of high-rise residential buildings in China. At the same time, it also marks that the development and construction of residential buildings in China has entered a new era of residential steel structure system.

In recent years, Shandong Laigang Construction Company has become an important promoter of domestic steel structure construction. The Shanghai Shifuhui Project and Jinan Eiffel Garden undertaken by Laigang won the first and second gold awards for building steel structures in China respectively. At the same time, Laigang has also obtained the certification of the Ministry of Construction: the first-class "qualification for general contracting of housing construction projects and the" second-class "qualification for special engineering design of light housing steel structures (single-layer rigid frame, row frame, multi-layer frame, net frame and net shell). This indicates that Laigang can independently build buildings with higher building requirements such as more than 25 floors, a height of more than 100 meters, and a single building area of 30000 square meters.

The development of steel structure housing is one of the easiest production methods to realize industrialization, and it is also the most in line with the national industrial technology policy of protecting arable land and saving energy. At present, the housing demand of urban and rural residents in my country has shifted from the quantitative pursuit of living space to a period of equal emphasis on quantity and quality. Promoting the modernization of the housing industry and accelerating the transformation of the traditional housing industry with modern science and technology, thereby improving the quality of housing, is to realize the housing production mode from Extensive to intensive transformation of major initiatives.

At present, China's steel structure housing industry has entered a new stage of development, the relevant norms and standards have been issued, the domestic steel production is sufficient, with a number of steel structure housing pilot and demonstration of construction experience and scientific and technological achievements, the development of steel structure housing has a good material and technical foundation. Of course, in the development of steel structure housing, there are still some technical problems to be solved. The promotion of steel structure housing also need to do a lot of work, improve different types of structural design specifications and construction technical standards, the development of new lightweight insulation wall materials and supporting the problem of residential parts, but also widely publicize the benefits of the development of light steel housing, so that more developers, designers and users know the advantages of steel structure housing.

With the improvement of the overall living standards of our people, the requirements for the quality and quality of housing will also increase. The steel structure is an environmentally friendly house, and the steel structure conforms to the concept of sustainable development.