L48A1 Mast Section Safety precautions for lifting operation of tower crane
1 in order to ensure the safety of the construction of the group towers, the lifting of the group towers shall be conducted under the unified command. The lifting operation shall be conducted under the command of Yang Lixin, Yu Baolan, Li Ping and Yuan Zhenke of the project department after being signed and approved at the same time.
L48A1 Mast Section：
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2 check whether the hydraulic oil and hydraulic system are clean and free of dust, powder, metal chips and other impurities.
3 the maximum value of the hydraulic gauge shall not exceed the allowable value.
4 before jacking, check the clearance between the jacket roller and the tower body, and then loosen the cable, whose length is slightly greater than the jacking height.
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5. The lifting operation must be directed by a specially assigned person, and non operators are not allowed to get on the tower crane.
6. During jacking, it must be kept in a balanced state, and it is strictly prohibited to rotate.
7 at the end of jacking, it must be lowered to the original position and fixed with bolts.
8 when the wind force is above level 4, the jacking work shall not be carried out.
L48A1 Mast Section：
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