Rotating hook prevention and avoidance measures

      In practice, the following measures can be taken to improve the stability of the hook in order to reduce the possibility of rotating the hook:
       (1) When a plurality of pulleys hook,lift hoist and boom to the extent possible with the use of a pulley on the outside by a pulley;
       (2) there are multiple hooks on the crane when possible, use larger diameter pulleys;
       (3) make use of wire rope double the number of the number of horses; conditions permit, try to use more number of horses to reduce the single-piece force;
       (4) around the wire rope wear, the top section of the crane hook pulley and not between the pulleys shifted too much to reduce the rise and fall of the hook wire rope hooks horizontal rotational force generated;
       (5) in the lifting process,lever hoist the boom top and the hook as far as possible to reduce the length of wire between, for example, using methods such as larger span;
       (6) When lifting, use slip rope hanging objects to be controlled so that, if the lifting height is relatively high, but is not required to rotate the hook in place, you can lock the hook;
       (7) when lifting the driver to have a smooth operation, landing hooks and rotary movements do not simultaneously;
       (8) Optional rope when other conditions are met in the case, try to choose "no spin" rope;
       (9) crane wire rope used for a period of time,hoist and trolley or to re-wear around the fixed end untied the rope release torque.