Which combination of factors is important in levelling slings for lifting?

The importance of load weight and sling angle in leveling slings for lifting stems from their direct impact on the effectiveness and safety of the lifting operation. Load weight is crucial as it determines the amount of force that the sling must support. A heavier load requires more robust and appropriately rated slings to prevent failure during the lifting process.

Sling angle is equally significant because it influences the distribution of the load across the slings. When a sling is angled, the tension in the sling increases; thus, understanding the correct angle helps ensure that the slings can bear the load without overstressing. For example, a lower sling angle can cause an increase in the load's effective weight on the sling, hence requiring slings with higher capacity.

Combining these two factors ensures that the lifting operation is conducted safely and efficiently, minimizing risks associated with lifting heavy loads. Proper consideration of both load weight and sling angle is essential for achieving a stable and balanced lift, which is critical in the rigging and lifting field.