Light steel structure is a young and very vigorous steel structure system, which has been widely used in general industrial and agricultural, commercial, and service buildings, such as office buildings, villas, warehouses, stadiums, entertainment, tourist buildings and low- and multi-storey buildings. Residential construction and other fields can also be used in areas with increased floors, renovation, reinforcement and lack of building materials, areas with inconvenient transportation, tight construction schedules, and movable demolition buildings, etc., which are highly favored by owners, mainly with the following characteristics:

1) The use of high-efficiency lightweight thin-walled profiles, light weight, high strength, and small footprint.

2) The components are all automated, continuous and high-precision production, and the product specifications are serialized, finalized, and matched. The dimensions of each part are accurate.

3) Structural design, detailed drawing design, computer simulation installation, factory manufacturing, site installation, etc. are carried out simultaneously with a small time difference.

4) The dry construction method above the foundation has no wet work, and the interior decoration is easy to be in place at one time. After the profile is galvanized and coated, the appearance is beautiful and anticorrosive, which is beneficial to reduce the cost of enclosure and decoration.

5) It is convenient to expand the column distance and provide larger separation space, which can reduce the storey height and increase the building area (the residential area can reach 92%). Obvious advantages in adding floors, renovation and reinforcement.

6) The new wall material has a wide application range, a large number of lighting belts are used, and the ventilation conditions are good.

7) The indoor plumbing and electrical pipelines are all concealed in the wall and between the floors, with flexible layout and easy modification.

8) The house can be relocated, the materials can be fully recycled, and it will not cause garbage, which is in line with the sustainable development strategy.

The application of non-residential buildings in developed countries is very rapid, and it is expanding to multi-story residential buildings. Non-residential buildings are dominated by door-type light steel structures with four floors or less, with spans generally greater than 20m. They are commonly used in the construction of large-span light industry, electronics, warehouses, and processing workshops, and they are also used in daily supermarkets and temporary Use houses, hangars, etc. Light steel structure residential buildings are generally used for multi-storey (4-6 floors) and high-rise buildings with a height of less than 24m (7-9 floors). By adding energy dissipation components such as energy dissipation supports, residential light steel structures can also be used for higher floors. The residential light steel structure mostly adopts the frame structure composed of hot-rolled H-section steel, the joints are connected by high-strength bolts (supplied by welding), the floor slab is mostly used for the reinforced concrete structure with the profiled steel plate substrate instead of the formwork, and the roof and exterior walls are mostly used Color-coated steel plates that integrate heat preservation and waterproofing, and waterproof lightweight wall panels are mostly used for household walls.