Crane operation risk, is depended on any possibility of accident and hurt during crane operating time.
Possibility of Crane Accidents
The time of crane accidents
During crane’s service life, accident is potential all the time, it may occur when the lifting crane is lifting, traveling, installing, being adjusted, maintained, even inspected, dangerous maybe come, especially when lifting crane is lifting something and dismounted. So the crane accidents not only occur by abnormal working condition, also occur during regular crane operating.
Emergency of risk events
Hoisting accidents, especially some heavy falls or metal structure tilting collapse, no indication, no forecast, not as general mechanical devices, it can stop the risk events, even no escape access.
Staff characteristics of the high incidence of accident
As data indicate, the wounds are mostly crane operators and drivers, riggers and some other workers. Among them, the riggers has the highest percentage of damage, especially in informal employment, low educated workers.
Crane working area is big and this scope of persons in a large metal structure movement, the ground is always on the risk of falling heavy. Crane driver’s normal operation, maintenance on high place, disassembly and assembly of crane, and security examination, all above requires personnel working under high risk possibility.
Severity of Crane Accidents Consequences
The lifting accidents not only lead to injuries, it is often accompanied by widespread damage to the equipment and facilities. Especially heavy falls and metal structure collapse with instability, often caused by malignant accidents. Crane working range is larger, the heavier of lifting capacity, the more serious of accident consequences.
The crane accident type is concentrated
Mechanical injury accident is the main accident types when crane work, such as heavy fall, crush, clash, crane overturning accident, etc. In addition, it could happen to get an electric shock or other damage caused by material. On one device there are many kinds of crane accidents.
Accident Group Feature
Different from one man one machine work in a small range, crane operation need people to participate in and cooperate, and some construction sites or water conservancy construction site, gathered a large construction personnel in crane working area, and often involves many people in the event of accident.
What Causes Crane Accident
Decoupling/unhook is a dangerous thing during crane operation, many factors result in decoupling. Here are a few reasons for detailed analysis:
1. Firstly, crane’s designing is not reasonable, for example: overload limiter is work-off, shaft strength is not enough, no hook lock, sling/wire rope is not suitable; secondly, some fault made when manufacturing and assembly, like material is not right, machining quality is not good enough, some potential danger is hidden. More problems are caused during working: not replace spare parts in time, no safety protection, and no maintenance and so on. In a word, we must be serious and careful on every step of crane.
2. Safety Management Defects. The safety awareness of management is very important. Crane management, inspection and regular safety testing of performance; Safety education and training to relevant personnel; Special training for crane operator. Crane safety operation regulations and the establish system of rewards and punishment , accident emergency plan, regular inspection to lifting equipment and auxiliary equipment, lack of effective monitoring and management, etc. Any negligence on safety management, will become important reason of the hoisting casualty.
3. Operator’s Unsafe Behavior. People's behavior is effected by multiple factors such as physical, psychological and overall quality, influence his performance if unskilled operating, lack of necessary safety training; pseudo driver, unlicensed operator, bad operation habits; commanding signal not clear, cooperate between driver and rigger is discordant etc. Shortly, Lack of safety awareness and operation skills are major accidents reason by human being.
4. Bad Environmental standard exceed safe limits. Hazard environment refers to those such as heavy dusty, high temperature, high humidity, low temperature, high noise, windy, poor lighting environment etc. Working in these conditions, will be a distraction, which directly affect the operator‘s ability to respond, the stability of the technology, wrong operation, and lead to accidents. In addition, the bad working environment can reduce crane’s performance or functions, even shorten spare parts service life, become unsafe factors.
There are many reasons cause crane accident. Therefore, crane manufacturers must comply with National Standard to select qualified equipment, guarantee the safety protection measures and plant construction, lifting process, working environment, and regular inspection, etc.,