What is the purpose of a fall arrestor?

What is the purpose of a fall arrestor?

The purpose of a fall arrestor is to prevent serious injury or death when a person is at risk of falling from heights. It works to stop the fall quickly and safely, minimizing the impact force. 

For example, in construction or industrial work, it protects workers on scaffolds or rooftops. By catching the fall, it ensures their safety and reduces the likelihood of severe harm.