Sling Angle is the angle measured between the horizontal plane and the sling leg or body. When selecting a sling to carry a given load, it is important to consider the angle at which the sling is going to be used. The angle is very important and can have a dramatic effect on the rated capacity of the sling, due to the increase of tension caused by the angle.
As an example, one sling in a basket hitch or two slings attached to one crane hook are different applications involving different sling angles. The degree of the angle will determine how much the capacity will be reduced. To determine if a particular sling will have the capacity required, take the angle between the sling leg and the horizontal, then multiply the sling’s rating by the factor provided in the accompanying table.
In the example below, you will see how the 1,000lb capacity of a sling used in a vertical basket hitch is reduced taking these factors into consideration.
3 Basic Hitches
Effects of Sling Angles
Sling Capacity Changes as Angle Changes
Sling Reduction Chart
|Angles in Degree||Sling Reduction Factor|
Choker Hitch in Angles
|Angle of Choke, deg||Rated Capacity, % [Note (1)]|
Note (1): Percent of sling rated capacity in a choker hitch.
Rated loads for angles less than 120º shall be determined by using the values above, the sling manufacturer, or a qualified person.