The most common killer of ground personnel working around cranes is:

The most common cause of fatalities for ground personnel working around cranes is contact with energized power lines. This hazard poses a significant risk because crane operations often involve lifting equipment and materials high into the air, which can lead to accidents if crane operators are not aware of the location of overhead power lines.

When a crane comes into contact with power lines, it can result in electrocution, which is often fatal. Ground personnel are particularly vulnerable since they may not have the necessary training or awareness about the risks associated with electrical hazards. Proper training and safety protocols are essential to help crane operators and ground workers recognize and avoid these hazards. Therefore, ensuring that everyone on-site is educated on the dangers of energized power lines can significantly reduce the risk of accidents.

In contrast, while falling loads, equipment malfunctions, and improper signage are also serious risks in crane operations, they do not occur as frequently as accidents involving power line contact. Each of these other options represents important safety concerns, but they are not the predominant cause of fatalities among ground personnel. Understanding the specific risks associated with overhead power lines highlights the importance of maintaining a safe working environment through vigilance and adherence to safety regulations.