What must the operator of a digger derrick not do while a load is suspended?

The operator of a digger derrick must not leave their position at the controls while a load is suspended because ensuring the safety and stability of the load is paramount during this operation. By remaining at the controls, the operator can monitor the load and make necessary adjustments if something goes wrong, minimizing the risk of accidents or instability. Being at the controls allows for immediate response in case of an emergency, ensuring that the load can be safely lowered or adjusted as needed. This requirement is in line with safety practices to prevent injuries and accidents that can result from unattended or uncontrolled lifting operations.

Staying at the controls also aligns with industry standards and regulations that dictate the safe operation of heavy equipment. Therefore, it is crucial for the operator to remain vigilant and maintain control over the equipment while a load is lifted to ensure the safety of everyone involved in the operation.