Light steel villa market prospects
Due to the strengthening of environmental awareness and wood shortage and other factors, many countries such as the United States, Japan, the United Kingdom, Australia, etc., are actively promoting the application and development of low-rise light steel villas.
Australia as early as the 1960s put forward the concept of "rapid installation of prefabricated housing", but because the market is not mature has not been well developed. By 1987, high-strength cold-formed wall steel structures appeared, and the joint Australia-New Zealand code AS/NZS4600 cold-formed Structural steel Code was issued in 1996. This steel bearing capacity is high, compared with the same bearing capacity of wood, only 1/3 of the weight of wood, the surface is galvanized, and the durability can reach 75 years without major repair.
According to reports, light steel villas in the United States is the fastest growing, 1965 young steel villas in the United States accounted for only 15% of the construction market; By 1990, it had risen to 53 percent, by 1993 to 68 percent, and by 2000 to 75 percent. The standardization and serialization of residential components and components, and the degree of specialization, commercialization and socialization are very high, almost 100%, and the leasing of various construction machinery, equipment and instruments is very developed, and the commercialization degree is 40%.
In recent years, light steel keel system buildings with all components using cold-formed steel are developing rapidly in Europe and the United States as an emerging construction method, and increasingly become a special commodity that can be ordered, which is widely used in villas, residences, scenic areas, office clubs, schools, hospitals, commercial buildings and so on. In Australia, about $600 million of light steel keel detached houses are built each year 120,000, accounting for about 24% of the value of all construction business in Australia; In the United States, the number of homes built using the system soared from 55,000 in the mid-1990s to 325,000 in 2000. At present, this light steel villa has become the main form of building structure in developed countries.
There are profound reasons why the light steel villa system, including single-storey and multi-storey houses and apartments, has developed so rapidly and is on the rise: Compared with other forms of steel structure housing, the light steel integrated housing system, especially the cold-formed thin-wall light steel keel housing, has some unique comprehensive advantages:
(1) Light steel villa light weight, high strength, good seismic performance, high safety. The building's self-weight is light, only equivalent to about half of the concrete structure.
(2) Light steel keel system components manufacturing and mechanization, high degree of commercialization, easy to achieve industrialization, industrialization can shorten the construction period.
(3) The section of the component is small, and the effective building area can be increased by about 8% compared with the concrete structure. The roof adopts steel frame structure, which can build a rich and colorful roof form, beautiful appearance, and meet the personalized requirements of the building.
(4) Indoor water and electrical pipelines can all be buried in the wall, flexible layout, easy to modify. It is suitable for environmental protection and energy saving wall panels, floor panels and roof panels with high scientific and technological compatibility, and the energy saving effect is good
(5) Light steel villa construction noise is low, less construction waste, the materials used are mainly recyclable or easily degradable materials, conducive to ecological environmental protection, in line with the requirements of green building and sustainable development, belong to the green environment-friendly building.
(6) Light steel villa energy saving and environmental protection, compared with ordinary mixed structure, the total energy consumption of light steel structure is 30%, carbon dioxide emissions are reduced by 67%.
According to the results of practical application, the cost of light steel villa system is slightly lower or equal to that of reinforced concrete structure system in earthquake area and soft land construction, and it has strong competitiveness. Considering the long-term use, development trend and environmental protection requirements, light steel villa development prospects are good, the market demand is large, will gradually become the new "selling point" in the housing market. Light steel villas are widely used in villas, tourist vacations, camp dormitories, scenic facilities, mobile homes, post-disaster reconstruction, offices, clubs, sales offices, model houses, schools and the construction of new rural areas in urbanization.