For lifting a substation superstructure section with slings, what is the preferred sling angle greater than?

The preferred sling angle greater than 45 degrees is important for maintaining safety and efficiency during lifting operations. When the angle of the slings is too shallow, it can increase the risk of slippage, which might lead to loss of control over the load. A steeper angle, specifically above 45 degrees, helps distribute the load more evenly across the slings, reducing the stress on each sling and minimizing the risk of failure.

Maintaining angles greater than 45 degrees also enhances stability during lifting. At this angle, the tension in the sling is more effective at lifting the load directly upward rather than pulling away from the load’s center of gravity. This eliminates the chances of the load swaying or tilting, which is crucial when dealing with heavy sections of a substation superstructure that can be difficult to maneuver.

In contrast, angles that are too low may compromise the integrity of the sling setups and pose safety hazards for the crew involved in the lifting process. Thus, adhering to the guideline of using sling angles greater than 45 degrees is vital for safe and effective lifting operations.