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2024
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Lapping of steel bars
Overlap of steel bars is an economical and effective connection method, suitable for connecting smaller diameter steel bars. The connection is achieved through overlapping lengths and wire binding, and is widely used in concrete structures.
Lapping of steel bars is an effective method of connecting steel bars and is suitable for connecting smaller diameter steel bars. It is connected by two steel bars that overlap each other to a certain extent and are tied with wire. This connection method is mainly used for reinforcing steel mesh in concrete. The longitude and latitude are evenly arranged. No welding is used, and only wires are needed to fix it.
During the construction process, if the length of the factory steel bars does not meet the usage requirements, measures must be taken to connect the steel bars. Lapping is one of the commonly used methods. When lashing lap joints are used, the force transmission between steel bars depends on the bonding force between the steel bars and concrete. Therefore, there must be sufficient lap length to meet the corresponding structural requirements to ensure the force transmission.
In addition, the connection methods of steel bars also include mechanical connection and welding. The mechanical connection adopts spiral or extrusion sleeve connection, which is simple, reliable and economical. Welding includes arc welding, electroslag pressure welding, air pressure welding, etc. Among them, the joint types of arc welding include lap joints (single-sided welding or double-sided welding), bonded joints (single-sided welding or double-sided welding) ), section joints (flat welding or vertical welding), etc.
In specific applications, considering construction costs and material costs, steel bars with a diameter of 12 mm and below are often tied and lapped. When longitudinal stress-bearing steel bars use tied lap joints, the setting of the joints should meet certain specification requirements. For example, joints within the same component should be staggered in batches, and the clear transverse spacing of each joint should not be less than the diameter of the steel bar, etc.
In summary, the overlapping of steel bars is an economical and effective connection method, which is suitable for connecting smaller diameter steel bars. The connection is achieved through overlapping lengths and wire binding, and is widely used in concrete structures.
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