Safe stop
It is not safe to work or walk directly under a suspended object as it may fall on you. In the lifting operation, the area under the boom, under the lifting object, in front of the lifting object, the triangle area of the guide rope, around the fast rope, standing on the inclined hook or the direction of the force of the guide wheel are all very dangerous positions. The location of staff is therefore very important. Not only should we always pay attention, but also remind each other, check the implementation, and prevent accidents.
Understand the safety factor of the sling correctly
In the lifting operation, the staff do not have a correct understanding of the safety factor of the lifting belt, and often think that the lifting belt can not be broken, resulting in overweight operations are always in a dangerous state.
Be proactive when dismantling
Demolition operations must anticipate the various factors encountered. It is not allowed to estimate the weight of the object, the thoroughness of the cut, the increased load of the extruded part, and the forced lifting of the connecting part without inspection.
Eliminate erroneous operations
Lifting operations are different from many buildings. It involves a large area and often uses different units and different types of cranes. Factors such as daily operating habits, performance, and differences in command signals can easily lead to misoperation, so be especially careful.
Be sure to secure the bound object
When lifting and dismantling at high altitude, "lock" rather than "bag" should be used for lifting objects; The sharp edges and corners of the hanging objects should be taken "cushion" measures.
The drum rope is not tight
For large lifting and disassembly, the steel rope wound on the crane or motor driven hoist drum is loosely arranged, causing the fast rope with a large load to be pulled into the rope bundle, making the fast rope violently shake and easy to lose stability. In this way, it may lead to the danger of continuing operation and the embarrassment of stopping work and being unable to stop.
Improper selection of lifting tools or lifting points
Building lifting tools or using pipes and structures as a focus lacks theoretical calculation. According to experience, the carrying capacity of lifting tools, pipes and structures is insufficient or local carrying capacity is insufficient, and instability will cause total collapse.
Improper pulley and rope selection
When setting the lifting tool, the change of rope force of pulley and pulleys caused by the change of the Angle of the fast rope is insufficient, the tonnage of the guide pulley is too small, the rope of the pulleys is too thin, and the force is too large.
The unloaded sling accidentally suspended the object
There are many accidents that happen: the lifting work has ended, when the hook is running with the empty rope, the sling pulls the unhooked object or other object in the free state, if the crane operator or the commander does not react in time, it is easy to cause an accident, this accident has very bad consequences for the operator and the crane.
