What should be confirmed before the stacker performs the direct stacking operation of the goods?

Before performing direct stacking operations with a stacker, it is essential to confirm that the structure of the stacked lower cargo is sturdy. This is crucial for maintaining stability during the stacking process. If the lower layers of cargo are not sturdy, it could lead to instability, risking the collapse of the stack. A strong and stable lower layer is necessary to support additional loads being stacked on top of it, thereby preventing accidents, injuries, or damage to the goods.

The other factors, while important in the overall safety and efficiency of forklift operations, do not directly address the immediate concern of the structural integrity of the cargo being stacked. For instance, confirming the area is free of obstacles is vital for safe navigation but does not impact the stability of cargo once it is being stacked. Ensuring the operator is fully trained is crucial for safe operation and adherence to protocols, but it doesn't directly pertain to the condition of the cargo itself. Lastly, verifying the optimal weight of the cargo is important to avoid overloading but does not speak to the need for a strong foundation for stable stacking. Thus, confirming the sturdiness of the lower cargo is the priority in this scenario.