What are the actual regulations for tower crane bolts in the case of connection?

2023/07/27

1. If the tower crane is in the running state, if there is a large difference in the pre-tightening force in the same area, then the difference in the axial force borne by the connected bolts will be relatively large, so the bolts with a large pre-tightening force will easily cause damage during long-term work under light loads. It means that if one of the eight basic bolts is found to be cracked during the operation, the above situation will occur, so special attention should be paid to maintaining the same pre-tightening force. In the process of manual operation, it may happen that the force of human resources is uneven, so the pretightening force of the bolts of the pole is also different. The solution is to use a daily torque wrench. 2. After the first tower crane has been in operation for 2 working hours, all the bolt connection standard parts should be inspected once, and a regular date should be set to carefully check and rotate the tower arm. The bolts in the safe position should be under the equalizing arm, so as to ensure its safety factor. 3. During the process of changing the site, the tower crane bolts of the tower body should be carefully checked and maintained regularly. If cracks are found, or a certain position is severely damaged or partially deformed, the tower crane bolts must be replaced immediately, and they cannot be reused multiple times, as this will cause obvious damage. If it is found that the tower crane does not meet the requirements, self-adjustment cannot be carried out. Since the requirements for the strength of tower crane bolts are very high on the construction site, it is necessary to use reliable bolts to prevent accidents during the operation process. The tower crane bolt is a standard part for mechanical tightening. It consists of two parts: the head and the screw, and must cooperate with the nut to tighten and connect two parts including the eye pupil.

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