How is sling angle stress calculated?

The correct method to calculate sling angle stress involves multiplying the weight at the attachment point by the angle. This approach takes into account how the angle of the sling affects the distribution of forces.

When a sling is used to lift an object, the weight being lifted creates a vertical force, while the angle of the sling affects how that weight is transferred through the sling. Specifically, as the angle of the sling increases (the sling becomes less vertical), the effective weight that the sling must support also increases due to the geometry involved. Therefore, by multiplying the weight by the angle, you can determine the stress on the sling, ensuring safe lifting practices.

This calculation is critical for determining whether the sling can safely handle the load, as a higher sling angle can significantly increase the load's effective weight on the sling. This understanding is essential for maintaining safety and compliance with lifting standards in rigging operations.