China FAMOUS Steel Engineering Company Company News

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.

The advantages of building a steel structure villa: the steel structure has good stability, and the stability of the steel structure villa is very strong. The construction period is relatively short. Before the construction of the villa with the steel structure, all the engineering components have been completed, so the construction of the steel structure villa is relatively simple and takes a short time. The price of the steel market is relatively stable, and the price of building steel structures is relatively cheap. Light steel villas have various color shapes, such as strong adhesion and leakage resistance, short construction period, earthquake resistance, wind resistance, thermal insulation, moisture resistance, and high use space. Most of the building materials used are recyclable and green and energy-saving. . Light steel villa installation process, so that everyone has a clearer and more intuitive understanding of it. Light steel structure has light weight, less earthwork for foundation construction, little damage to land resources, and reinforced concrete strip foundation is generally adopted for foundation. Because the weight of the steel structure house is only 1/4-1/6 of the reinforced concrete structure house, the basic treatment is relatively simple. The connection between the steel structure and the concrete foundation is embedded with 10-12 corner bolts along the load-bearing wall, and the spacing is generally 1.2-1.5 meters. Considering the requirements of earthquake resistance and wind resistance of the house, galvanized flat iron shall be embedded at the corner of the house to connect with the steel structure. According to the design drawings, the main components are directly assembled at the factory after the production and transportation. The component area is small and the thickness of the envelope structure is small, which can increase the use area of ​​the building. After the waterproof treatment on the flat foundation, the dragon skeleton is installed. The light steel keel is a double-sided aluminum-zinc-plated steel, which not only has good toughness and ductility, but also ensures that the house will never collapse during an earthquake. The distance between light steel keels is scientifically calculated to ensure the overall safety of the house. The truss structure between the floors ensures the stability of the structure, increases the stability of the steel structure system, and forms a stable structure of the steel structure physical system. The wall of the light steel villa is combined with the current civil engineering technology and the fireproof and moisture-proof insulation technology, which can install the water and electricity pipelines in the wall in advance, which is conducive to the neatness of the house, unlike traditional houses that require red brick and concrete wiring and water and electricity Wake up and remodel. The wall of the light steel villa is composed of installing functional boards. There are many kinds of functional boards. Commonly used are fireproof, waterproof, noiseproof, thermal insulation, thermal insulation and various wall hangings for decoration Edition etc. The roof treatment is similar to the wall installation, except that the sun protection layer and waterproof layer are added, and the top layer is covered with another tile. At present, there are many types of tiles, including cement tiles, terracotta tiles, asphalt tiles, and metal tiles. A variety of colors and patterns can be selected. External wall sealing board The external wall osb board ensures the integrity of the structure. The exterior decoration materials include American PVC hanging board, cement wood grain fiber board, metal carved board, etc. It is environmentally friendly, durable, beautiful and diverse in color! The materials of the interior wall can be selected according to your own economic conditions.

The prefabricated structure refers to the construction of the building pre-fabricated in advance in the factory or on the construction site or elsewhere, and then the construction of these buildings is transferred to the construction site by means of transportation, through the cooperation of a certain splicing technology and some mechanical lifting, The building structure is constructed by assembling these scattered prefabricated buildings into a whole. With the sustained and rapid development of China's economy, the continuous increase in labor costs, and the increasing awareness of energy conservation and environmental protection, in recent years, China's research on prefabricated structure construction has gradually increased, and many units have developed some technologies. the study. Among them, the representative Vanke enterprise has become a pilot real estate enterprise of prefabricated structure construction in my country, has completed more than ten projects of actual size, and obtained good economic benefits. 1 Classification and advantages of prefabricated structure 1.1 Classification of prefabricated structures Prefabricated buildings can be divided into two categories according to their degree of assembly: (1) Fully assembled. All components of this type of building are just like mechanical production products, which are produced in batches in the factory and then transported to the construction site for assembly. These components mainly include assembled large slabs, beams, frame structures, slab-pillar structures, box structures, etc. The maintenance structure around the fully assembled building can be masonry or pouring on site, as well as prefabricated wall panels. The main advantages of this fully-assembled building are the high production efficiency of building components, the quality of mass-produced components is guaranteed, the construction speed of direct splicing is fast, and the seasonal impact during the construction process is small. Large and relatively stable areas, if factory production of building components will achieve better results. (2) Semi-assembled type. The main load-bearing components of such buildings are partly prefabricated components and partly will be built on site. For example, in building structures, brick walls are generally used for vertical load-bearing, so such components can be masonry on site. Like floors, beams. Stair platforms and other horizontally load-bearing components generally use prefabricated components for site hoisting. In large-scale buildings, a common practice is to use prefabricated components for the outer wall, and the inner wall is usually cast-in-place using formwork. The main advantage of this type of construction is that the one-time investment cost of the required production base is less than that of a fully assembled building, the adaptability is more extensive, a large part of the transportation cost is saved, and it is easy to promote. Under certain conditions, it can also achieve the effect of shortening the construction period, which is more conducive to the realization of large-scale flow construction in various places, and can obtain good economic effects and better structural integrity. At present, relatively more semi-assembled structures are used in my country's buildings, which are assembled monolithic structures. 1.2 Advantages of assembled structure According to foreign statistical data, the advantages of prefabricated buildings were introduced in terms of construction speed, engineering cost, etc.: (1) Saving labor. Also according to the data, the average time for a square meter in France is 20 man-hours per square meter, but after using prefabricated buildings for industrial production. After the assembly technology is used in construction, the man-hours per square meter fell to 11.5 man-hours. Obviously, when it was changed to a prefabricated building structure, construction labor savings by nearly 50%. In addition, it also reduces the intensity of labor. (2) Shorten the construction period. In Japan, under normal circumstances, a 100-family five-story residential house with a traditional construction method requires a construction period of 240 days. However, prefabricated buildings and building components are pre-fabricated at the factory and carried out on site. After the construction method of mechanical hoisting, it took only 180 days to complete the construction of a five-story residential building of 100 households, which shortened the construction period by 25%. (3) Reduce the cost. When the prefabricated structure and industrial construction methods are adopted, the construction cost per square meter is lower than that of the traditional structure. However, due to the different economic conditions of various countries, the structure of the building is also very different, so the cost reduction data are also different.