Today, the editor will introduce the difference between cold-formed steel and traditional building materials. I hope it will be helpful to everyone.

(1) The self-weight of cold-formed steel is light, saving steel. After the steel is cold processed, the cold bending effect occurs in the bending area of ​​the cold formed steel, which improves the strength. Compared with hot-rolled steel of the same area, cold-formed thin-walled steel can increase the radius of gyration by more than 50%, and its moment of inertia can be increased by about 50% to 180%. Under the same load, relatively hot-rolled steel can generally save steel10 %～25%. The weight of cold-formed steel is light. Under the premise of accomplishing the same function, its quality is only 1/8～1/10 of concrete structure, and 1/2～1/3 of ordinary steel structure.

(2) The structure has good integrity, safety and reliability, and good seismic performance. The roof truss, wallboard, and foundation of cold-formed steel houses are firmly connected together. Such structural houses, especially when the wallboard is attached with OSB board, gypsum board or corrugated board, should consider the strong skin effect to make the components The actual force and deformation are reduced by about 10% to 15% compared with the design of the plane system, which can be used as the safety reserve of the house. Due to the light weight of cold-formed steel, the seismic effect is basically not controlled in the design.

(3) The residual stress and connection method of cold-formed steel components are different from those of hot-rolled steel. The residual stress of cold-formed steel is formed by bending at room temperature, while the residual stress of hot-rolled steel is mainly due to the uneven shrinkage and deformation caused by uneven cooling. The distribution and influence of the two are different. Hot-rolled steel components are mainly connected by welding and bolts, while cold-formed steel components have high technical requirements for thin plate welding and damage the zinc coating. Welding methods include horn welding and resistance spot welding, and are less used. Zinc-coated cold-formed thin-walled steel mainly uses self-tapping and self-drilling screws, rivets and other connection methods. Cold-formed steel profiled steel plates are also connected by mechanical connection without connectors (such as occlusal, buckle connection, etc.).

(4) The industrialized production of building structures can be realized with a short production cycle. Cold-formed thin-walled components can basically realize factory standardized production, ensure stable and reliable quality, and help reduce costs. Splicing and installation on the construction site, convenient installation, fast construction speed, high precision, and not subject to seasonal restrictions. For example, the construction period of a 30m2 wall is only 1/8 of that of a concrete wall. Its characteristics of short construction period and quick return on investment can effectively reduce the capital pressure of initial investment and are welcomed by the majority of owners.

(5) The appearance of the house is beautiful, the space layout is flexible, the use space is large, and the comprehensive economic benefits are good. Cold-formed steel houses can be made into colorful roofs and colorful walls with various slopes according to requirements. The colors are bright and durable, and the architectural shape is beautiful. Flexible division of architectural space. The component has a high bearing capacity and a small cross-sectional area, which can increase the usable space by 5%-10% compared to a concrete structure house. The material is not aging, non-combustible, non-mold, non-worm-eaten and less maintenance. The basic cost of a cold-formed steel house is close to that of a concrete house, but considering the basic cost and use space and other related factors, its comprehensive economic benefits are better than concrete structures.