132HC Mast SectionUnder what standard can the tilt angle of tower crane be used normally
The foundation of tower crane is the most important work in the installation of tower crane. It should be done well as soon as possible to avoid inclination or instability after the installation of tower crane. In this paper, if there is a tower crane tilt how to do, how to know the tower crane tilt angle is how much, under what standard tower crane tilt angle can be used normally?
According to the industry standard, the tower crane with verticality no more than 4 ‰ can be used safely. If it exceeds 4%, it shall be immediately stopped and reinstalled.
When the tower crane is in the most unfavorable condition (non working state), the critical maximum inclination L, which can ensure that the tower crane does not overturn at the measurable height, is calculated. Pay attention to regularly observe the tilt speed and amount of the tower crane, and make records. Once the tilt reaches 0.5L and continues to tilt, it is necessary to take decisive measures such as tower removal. If the tower crane cannot be stopped immediately and the deflection is not more than 0.25L, the following safety measures can be taken:
1. Increase the weight block on the concrete foundation (place some more in the opposite direction of inclination), increase the foundation quality, reduce the height of the tower crane center of gravity and reduce the E value.
2. At the proper height of the tower crane, the wall attachment device shall be added.
3. The cable wind rope shall be set at the appropriate height of the tower crane to prevent the tower crane from continuing to tilt.
It is hereby reminded that tower crane installation must be done well in order to ensure safe construction and avoid repeated construction.
