Have you ever needed to determine the sling length for a desired angle of loading (horizontal sling angle), but perhaps struggled with how to get the correct answer?

First, you will need to know four pieces of information:

  1. Location of center of gravity (COG)
  2. Desired sling angle. ASME B30.9 now calls the horizontal sling angle the angle of loading.
  3. Length factor (L/D) for the desired angle of loading. Do not sweat this one. The math geeks have already provided this calculation for you below.
  4. Distance from pick point on the load to COG. This distance is the “D” in the example below.

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Rig safe!
– Danny

Danny’s Rigging Den is a blog series written by Danny Bishop, Crosby’s corporate director of value added training.