Tower cranes are large-scale mechanical equipment on the construction site. For different types of projects, there are different types of tower cranes, but it is necessary to pay attention to safety during construction, so pay attention to some points when renting tower cranes. So, what are the five major safety issues for cranes? What are the three main points of tower crane rental?
Three key points for tower crane leasing:
1.the determination of the installation method
The tower crane is a device used on the ground, and its own weight is much larger than that of general construction machinery. Therefore, the basic installation method of the tower crane after the tower crane is rented is also one of the main problems to be considered when selecting. There are three basic installation methods for the self-elevating tower cranes that are commonly used at present: the fixed feet in the large concrete blocks, the heavy-duty chassis and the walking type.best light crane manufacturer
Different installation methods have different ground pressure requirements for the foundation soil. Different types of tower cranes have different pressures on the ground. In addition, the foundation depth and slope type of the project also affect the installation method of the tower crane foundation, which in turn affects the selection of Jining tower crane rental. This requires the relevant practitioners to have relevant practical experience, and carefully read the chapters on the basic part of the product specification of the tower crane to be determined.
2.the determination of the height of the Kai
The commonly used jack-up tower crane can rise with the rise of the building. When the height of the tower crane exceeds the “free height”, if it rises again, the “attachment wall” measure is required, that is, the tower crane is under construction. The works are “anchor” together.
Different types of tower cranes have different heights for the first wall. The distance between each two “attached walls” is different. The attached wall of the tower crane has additional lateral tension on the construction project, which requires that some of the completed projects can reach relevant Strength of.
3.Determination of basic parameters
The basic parameters of the tower crane refer to the height of the tower crane, the length of the arm and the large lifting weight of the arm end. Except for the extremely special case, the maximum lifting weight of the tower crane generally does not need to be considered. According to the length, width and height of the building, it can be preliminary. Determine the arm length of the tower crane, the arm length to ensure that it can cover all the projects and a little margin is appropriate, the height of the tower crane can be 10~15m higher than the maximum height of the building.
The weight of the arm end is determined by the weight of the object to be lifted by the civil construction personnel. The general frame structure type of building, because the tower crane needs to lift the concrete bucket, the arm end has a larger lifting weight, and now the concrete structure of the high-rise building, The requirements are lower. After the above three parameters are determined, the type of tower crane rental can be initially determined.