(2) The tower crane subgrade must be higher than the natural ground 15cm, and it is forbidden to soak the subgrade in rain;
(3) When hoisting after rain, first check the stability of the crane itself, and then try hoisting after confirming that the safety of the crane itself has not been damaged by rain. Hoist the component to about 1m, and then hoist it after several times of stability.
(4) Rainy days may affect the sight of crane drivers. If the driver has no lifting experience in rainy days, stop lifting; Or ask an experienced driver to do it;
(5) When the construction is stopped, the hook of the tower crane should be retracted close to the tower body, and no slings, building components and other objects should be left on the hook, so as to avoid these heavy objects being shaken by the wind, which may lead to the collapse of the tower crane in severe cases;
(6) Because the surface of the component and the hoisting rope are wet, the friction coefficient between the rope and the component is reduced, and serious quality and safety accidents such as component slipping may occur; At this time, more attention should be paid to hoisting work, and measures such as increasing the surface roughness of ropes and components can be taken when necessary to protect the safety of hoisting work;
(7) When hoisting in rainy days, the forbidden area on the ground should be expanded, and additional personnel should be sent for vigilance when necessary.
(8) Stop all lifting operations in strong wind or heavy rain with a wind force of 6 or above.
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