9 Major Accidents Of Common Cranes

9 Major Accidents of Common Cranes
 

In daily operations, cranes will inevitably have accidents! So what are the common accidents? The following is a summary of the common accident types of cranes.
 

1. Crane loss accident:
 

It refers to the accidents of personal casualties and equipment damage caused by heavy objects such as hoisting loads and spreaders falling from high altitude during lifting operations.
 

2. Crane off-rope accident:
 

A de-rope accident refers to an accident of casualties and damage caused by the collapse of heavy objects from the bundled hoisting ropes.
 

 

3. Crane decoupling accident:
 

Refers to the heavy object falling accident caused by the heavy object or the sling coming out of the hook mouth.
 

Top hook accidents mostly occur on bridge or gantry cranes, which are caused by the failure of the height limit. At the same time, it also happens from time to time on other types of cranes. The main reason is that the rigging anti-off device of the hook fails or the hoisting method is improper.
 

4. Crane broken rope accident:
 

A broken rope accident refers to a heavy object loss accident caused by a broken lifting rope or hoisting rope buckle. This kind of accident is also very common.
 

The wire rope was broken due to overload lifting;
 

The failure of the lifting limit switch caused the wire rope to be broken due to overwinding;
 

Inclined hanging and cable pulling cause disordered ropes, crushing and cutting off steel wire ropes; steel wire ropes are broken due to long-term use and lack of maintenance, resulting in fatigue deformation, wear damage, etc., which meet or exceed the scrap standard and are still used.
 

Simultaneously, this type of accident caused by the breakage of the wire rope buckle for hoisting is also very common. The breakage of the hoisting rope buckle is mainly due to the inappropriate specifications of the steel wire rope buckle, resulting in a small safety factor; or the angle between the hoisting rope buckle is too large, causing its tensile force to exceed its breaking limit and break; or the steel wire rope buckle and the angular heavy The edges and corners of the heavy objects cut off the wire rope buckle due to the failure to take protective measures such as adding gaskets between the objects.
 

5. Crane hook broken accident:
 

The hook breaking accident refers to the accident of heavy objects falling caused by the breaking of the hook.
 

6. Crane crush accident:
 

Crushing accidents refer to personal accidents such as crushing, crushing, and wounding caused by the operator being squeezed between two objects during lifting operations.
 

 

7. Crane car fall accident:
 

During the lifting operation of the elevator car, the hoisting wire rope is broken, and the fixed end of the wire rope falls off, causing the occupants to fall together with the car car, causing casualties.
 

8. Crane electric shock accident:
 

Electric shock accidents refer to group death accidents caused by electric shocks caused by personnel engaged in lifting operations and maintenance.
 

That is to say, the cause of electric shock is generally an electric shock accident caused by the electric machinery itself as a shock source (usually during the mechanical maintenance process), or because the crane operating at a height is too close to the exposed high-voltage transmission line and does not ensure sufficient safety. The crane itself is connected to electricity due to the distance, which in turn causes the operator or lifting worker to be directly injured by high-voltage electricity.
 

 

9. Crane body damage accident:
 

Body damage accidents refer to accidents where the body of the crane breaks and overturns due to overloading and instability, causing serious damage to the body and personal casualties.
 

The accident occupies a very high proportion in self-propelled and tower cranes, and is one of the most common accidents.
 

The overturning of the hoisting machinery is mostly due to improper support before the hoisting machinery operation, such as uneven or soft foundation, and there is no special skid or road plate (steel plate) under the outriggers or crawlers;

 

Use according to the original performance table; safety devices such as crane torque limiters fail, and lifting heavy objects with excessive torque can easily cause the lifting machinery to tip over.

 

Note: Tower cranes, bridge cranes, gantry cranes and other large lifting equipment, as special equipment, must be inspected and maintained regularly.