China FAMOUS Steel Engineering Company Company News

200 tons galvanized steel DHS purlins girts exported to Oceania on Jul.26, 2020.

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52 industrial doors exported to North America on July, 2020.

3000 square meters aluminum veneer curtain wall exported to Oceania on June. 30, 2020.

380tons steel structure members exported to Oceania on JUL.2, 2020.

300 tons glass curtain wall exported to Oceania this month.

1. The integrated house has a higher degree of engineering, shortens the construction period, and greatly reduces the cost: Standardized modularity standards for temporary construction facilities have realized large-scale industrialized production of temporary construction, improved pre-engineering of buildings, and made temporary construction components of different shapes, different materials and different production methods have certain universality. At the same time, the pre-engineering of pre-construction facilities has integrated material processing and installation, which has greatly reduced the cost of construction and installation; and has accelerated the construction speed, so that the construction period can be shortened by more than 60%, thereby speeding up the capital turnover of construction units and enabling the construction site Start construction earlier. 2. The integrated house can meet the requirements of super-height and super-span: Light steel structure materials have uniform organization, high strength and high elastic modulus. The ratio of density and strength is much smaller than that of concrete and masonry. Under the same stress, the light steel structure has a small dead weight, which can be made into a large span and high height. Light steel integrated housing. 3. Integrated house design and function integration make the temporary construction facilities more functional: In the temporary construction facilities, the light steel structure has become an important factor in the image composition. The shape, components, and nodes of the structure have largely caused and restricted the image of the temporary construction. Only by integrating the design and function of the building and structure can the building be more functional, so that the subsequent design links can be carried out to create a temporary construction facility that integrates technology and art.

The light steel villa is a house building system made of light steel keel as the main material, other insulation and decoration materials, integrated production by the factory and on-site assembly. Light steel villa, also known as light steel structure house, its main material is light steel keel synthesized by hot-dip galvanized steel strip through cold rolling technology, after accurate calculation and support and combination of accessories, it plays a reasonable Carrying capacity to replace traditional houses. Because its load-bearing structure is light steel structure, the shape is particularly beautiful, so this new type of house is called light steel villa. The technology and product configuration of the light steel structure is very mature, and the degree of industrialization is high. It is the crystallization of North America's construction technology and building material industry development in the past century. The galvanized steel plate used in the building structure has excellent corrosion resistance and durability, and its service life under normal use is 275 years. The seismic performance of the light steel structure is far superior to the traditional concrete and brick-concrete housing. At the same time, due to the light weight of the structure of the light steel structure, the weight per unit area is only equivalent to 1/4 of the weight of the brick-concrete structure of the same area, so its basic treatment is simple and suitable for most geological conditions. Steel houses are no longer as worried about termites as wooden houses. Because the steel materials used in the structure are all processed by factory, the structural accuracy of the light steel villa is quite high. The structural system of a villa is composed of tens of thousands of components, and the average error of each component is less than 2 mm, ensuring that The quality of the house is beyond the reach of traditional construction methods. has the following four characteristics: 1. The structure is stable. 2. The cost is not expensive. 3. The span of the space inside the house is large. 4. Short construction period. Light steel structure is a young and highly viable 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, tourism buildings and low-rise and multi-story buildings. Residential construction and other fields. Advantages of light steel structure Light steel structure is a young and highly viable 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, tourism buildings and low-rise and multi-story buildings. The residential building and other fields can also be used in old house building, reconstruction, reinforcement and areas lacking building materials, areas with inconvenient transportation, tight construction period, and movable demolition buildings, etc., which are favored by the owners and mainly have the following characteristics: 1) Adopt high-efficiency and light-weight thin-walled profiles, with light weight, high strength and small occupied area. 2) The components and parts are produced by automation, continuous and high precision, and the product specifications are serialized, finalized and matched. The size of each part is accurate. 3) Structural design, detailed design, computer simulation installation, factory manufacturing, construction site installation, etc. are carried out simultaneously with a small time difference. 4) There is no wet work in the dry construction method above the basic level, and the interior decoration is easy to be in place at one time. The profiles are galvanized and coated with a beautiful appearance and anti-corrosion, which is helpful to reduce the cost of enclosure and decoration. 5) It is convenient to expand the column distance and provide a larger separation space, which can reduce the floor height and increase the construction area (the residential practical area can reach 92%). It has obvious advantages in adding layers, renovation and reinforcement. 6) The new wall material has a wide range of applications, a large number of lighting belts, and good ventilation conditions. 7) All indoor plumbing electrical pipelines are concealed in the wall and between floors, with flexible layout and easy modification. 8) The house can be relocated and the materials can be fully recycled without causing garbage, which is in line with the sustainable development strategy.

The construction and installation of the steel structure can only be built by connecting the steel structure beam and the steel structure column and other components. The connection method of steel structure can be divided into three types, one is welding, one is rivet connection, the other is bolt connection, and bolt connection is divided into ordinary bolt connection and high strength bolt connection. Today we will talk about a few precautions for high-strength bolt construction.   Test before installation For the selection of high-strength bolts, you must choose the products of regular manufacturers, and you must have a certificate of conformity and a material certificate. Before the construction of high-strength bolts, a retest must be carried out.   Storage of high-strength bolts High-strength bolts must be properly stored by a designated person. They cannot be arbitrarily thrown. The bolts cannot be damaged during the installation of the entire steel structure, and other pollutions cannot occur to prevent the torque coefficient of the bolts from changing. The environment must be protected from moisture and corrosion.   Installation attention When installing high-strength bolts, use a bald crowbar and punch to align the screw holes of the upper and lower or front and rear connecting plates to allow the bolts to enter freely. If the error of the screw hole of the connecting plate is relatively large, it should be analyzed and dealt with. If the adjustment bolt hole is invalid or the position of the remaining part of the bolt hole is not correct, you can use an electric reamer or a manual reamer to drill the hole.   When you have high-strength bolts, there are two steps. The first step is the initial tightening. When the axis of the steel column or steel beam is accurate, the final tightening should be completed within the day to prevent omissions.

1. Structural characteristics Lightweight steel structures usually use Q345 and Q235 steel, and most of them are Q345 steel. Q345 steel is the most commonly used and mature low-alloy high-strength structural steel with excellent performance and good weldability. Except for some column base plates, the thickness of the web and wing plates is basically 4-20mm medium thin plates, which is the most favorable thickness range for the welding process. Light steel structures generally do not use box-shaped and cross-shaped structures, and most of the members are H-shaped cross-sections. Due to the characteristics of economy, stress, and structure, rolled H-shaped steel is generally not used, and most of them are welded H-shaped steel. For H-shaped solid web beam-column structure, it is easy to realize the automation of welding and assembly. However, except that the sandwich beam, part of the side columns, and the middle column have the same cross section, most of the members are of variable cross section, which also puts forward higher requirements for the automation of welding. 2. Cutting method Gate-type multi-head flame cutting is the main cutting method of wing opening strips. Propylene, propane, LPG-type new gas has gradually replaced acetylene. Because the web thickness is thin, and most of them are wedge-shaped, CNC plasma cutting method is usually used. Plasma cutting method using oxygen, the cutting speed is fast, the cutting quality is good, but the requirements for the consumption electrode are higher. The cutting quality of web has a great influence on the assembly and welding quality of components. Due to the thin plate thickness, the deformation or residual stress after cutting will cause the wave-shaped deformation of the web. The quality of the cutting edge will directly affect the welding and quality of the fillet weld between the web and the wing. 3. Welding method The welding process and production process depend on the assembly of the H-beam, the welding of the main weld between the web and the wing, which varies depending on the assembly method, welding method and welding position. Such as the movement of the head or the movement of the workpiece; the horizontal position or the position of the ship; the single head or the double head; the single wire or the double wire, etc. For dry sheet structure, gas shielded welding is undoubtedly the most ideal welding method. Therefore, in addition to the submerged arc automatic welding, most of the board assembly welding uses gas shielded welding. In particular, argon-rich mixed gas shielded welding is more suitable for light steel structures due to its good forming and low spatter. 4. Painting In order to prevent rusting during stacking, transportation and installation, and to lay the foundation for further coating, pre-treatment and spraying of primer are required after welding of components. The surface quality of the surface treatment and rust removal of the component is required to be above Sa2.0～Sa2.5. According to the different environmental media of the component, choose anti-rust primer. The light steel structure primer is mainly alkyd type, but also epoxy zinc-rich type. At the installation site, apply topcoat or fire retardant paint as needed. Light steel structure is mainly H-shaped solid web beam column structure, so the surface treatment and coating process is relatively simple, and it is also easy to realize mechanized flow operation. The surface treatment adopts the shot blasting technology, the raceway type or the hanging type feeding method. Paint spraying is generally manual operation, combined with hanging shot blasting, or semi-mechanized assembly line operation. The surface treatment before painting is critical to the anticorrosive effect of the component primer, and the thickness and uniformity of the paint film will directly affect the anticorrosive performance of the component. 5. Main process issues Since light steel structure and heavy steel structure are very different in steel type, plate thickness and structural form, the main difficulties and problems in welding production are also very different. If the heavy steel structure is due to the thickness of the steel plate, high material grade, and poor welding conditions, the manufacturing problems are mainly reflected in the welding operability of the structure, the weldability of the steel, and the prevention of joint welding defects. The light steel structure is mainly Prevent and reduce the deformation and correction of welding, and improve the problem of welding productivity.