What is the primary concern when dealing with high boom angles?

When dealing with high boom angles, the primary concern is backward stability. At high boom angles, the center of gravity of the load can shift significantly, which increases the risk of tipping over or losing balance in the backward direction. This is due to the moment created by the weight of the load acting at a distance from the base of the rigging equipment, which can lead to instability.

In situations where the boom is extended at a steep angle, the load is positioned further away from the point of support, enhancing the potential for backward motion if not properly managed. Hence, ensuring that the rigging setup can maintain backward stability is crucial for safe operations.

Other concerns, while they may also pose risks, do not primarily dominate the challenge posed by high boom angles. Forward stability, side stability, and crosswind stability are important factors in various scenarios, but the distinctive challenge brought about by high boom angles primarily relates to the management of backward stability, making it the foremost consideration in these situations.