1. Position

In the hoisting operation of large-scale hoisting, it is very dangerous to stand under the suspender, under the lifting object, in the front area of the hoisted object, in the triangle area of the steel rope of the guide pulley, around the fast rope, and the force bearing direction of the cable-stayed hook or guide pulley, etc., and once the danger occurs, it is not easy to avoid. Therefore, the position of the staff is very important. Not only should they pay attention to it at all times, but also need to remind each other and check the implementation to avoid accidents.

2. Correctly understand the safety factor of sling

In the hoisting operation, the workers do not have the correct cognition of the sling coefficient, and often use the rope continuously as the basis, resulting in overweight operation, always in a dangerous state.

3. Predictability of different factors

For example, it is necessary to remove the heavy parts without foreseeing the load.

4. Refuse wrong operation

Lifting operation is different from many construction, involving a large area, often using different units, different types of cranes. It is easy to cause misoperation due to the differences of daily operation habits, performance and command signals, so we should be very cautious.

5. Bind the object to be hoisted firmly

During the high-altitude hoisting and demolition, the "lock" rather than "pocket" shall be adopted for the lifted objects; the sharp edges and corners of the lifted objects shall be "padded" for large-scale hoisting.

6. The drum rope is not tight

When large pieces are lifted and removed, the steel ropes wound on the drum of the crane or the motor driven winch are arranged loosely, which causes the fast line under heavy load to be pulled into the rope bundle, causing the fast line to shake violently and easily to lose its stability. As a result, it is often dangerous to continue operation and can not stop.

7. No load sling hanging objects accidentally

Many accidents happen in this way. The lifting work has been finished. When the hook is running with empty rope and rigging, the sling in free state will hold the lifted object or other objects that have been uncoupled. If the driver or commander does not respond in time, the accident will occur, and this kind of accident has very bad consequences for operators and cranes.

8. Hanging objects in the air are not sealed with safety rope for a long time

Due to the installation process requirements of some equipment or components, large-scale hoisting needs to be suspended in the air and then fixed in place, while some suspended objects stay in the air for a long time. If there is no safety rope, once it is subject to accidental vibration and impact, it will cause serious consequences of the suspended object falling.

9. Construction is too busy to confirm the progress

There was no underground consultation for the crane station; the weight of the lifting objects was not confirmed before operation; the hidden problems such as high-voltage lines, operating equipment, coal and oxygen pipeline leakage points in the surrounding environment were not found in time, resulting in great losses.

10. Use sling with "problem"

In order to save time, some people find a rope buckle to use, but they don't know that it is abandoned rope buckle thrown by others. Some of them have suffered internal injury, some of them have gone through partial annealing, and others have been hit by electric welding. These problems are not easy to be detected. Some people are greedy to buy unqualified lifting appliances such as pulleys and rings produced by informal manufacturers at a low price, which makes workers worried when working. For the sake of construction safety, please do not use the rope buckle thrown by others, cut off the damaged and scrapped rope buckle in time, so as to avoid other people's misuse; do not buy the lifting appliances produced by informal manufacturers.

11. Use hemp rope as safety rope

Because the bearing capacity of hemp rope is far less than that of steel rope, and the hemp rope is easy to be damaged in daily storage and use, so the use of hemp rope as safety rope does not play a role, but makes people have psychological dependence and cause accidents.

12. No warning zone

The warning area and guardian were not set up in time in the dangerous area under the heavy lifting and high-altitude operation, which led to other people entering the dangerous area without knowing the situation and causing accidents.

13. "Brake rod" is not considered properly when lifting heavy objects with long boom of crane

When lifting a heavy object with a long boom of a crane, due to the "brake" of the crane boom under the force, the vertical line between the rod head and the center of gravity of the heavy object changes. If the lifting rod is not adjusted correctly, the object to be hoisted will shift instantaneously. If the operator does not consider carefully and does not take avoidance measures (mainly in the air), it can be an accident.

14. The weight of an object turned over by two vehicles at the same time is not accurate

Because the center of gravity is changing in the process of turnover, if the calculation is not accurate, it is easy to cause problems caused by overload and instability of one of the cranes. In this regard, if there is a problem, it will not only threaten the safety of people, but also cause great economic loss of machinery, which needs to be paid attention by construction and skilled personnel.

15. Inadequate consideration of climate impacts

In windy days, it is necessary to consider the influence factors of wind load on the crane, and do not operate when there is danger or the wind force is more than specified.

To sum up, the lifting operation involves construction organization, operation design, scheme formulation of Guizhou hoisting company, selection of machines and tools, personnel operation method, construction experience, cooperation and mutual protection, cooperation of various types of work, environmental characteristics and climatic factors, etc. Therefore, to do a good job in the safety work of lifting industry, it is necessary to pay attention to all aspects from construction management to personnel operation Act according to science.

In addition to strictly implementing the relevant regulations, the crane lifting operators should also study the operation methods, sum up experiences and lessons in time, and enhance the ability to prevent accidents. In the specific operation of large-scale hoisting, due to the differences in construction experience, operation methods and knowledge of each person, it is necessary to pay attention to the following aspects