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Load Weight Estimation & Area of a Circle

The workshop below uses the Journeyman Rigger's Reference Card panel 6, to help provide the solution.

The area of a circle can be calculated with either (Pi x radius squared) or (dia. x dia. x .80), and both arrive at very similar values for Area of a Circle. For riggers in the field, we use the dxdx.80 method since it is faster and simpler.

If circumference is desired, a person can use Pi x diameter, officially 3.1416 x d, or for quick figuring in the field, 3.2 x diameter.




Mike Parnell

Mike Parnell

Industrial Training International
"Everyday is a great day to be helping people learn and improve their skills", is a typical Parnell concept. Mike really looks forward to creating unique learning methods that can accelerate a student's learning curve in an ITI program. Mike regularly expresses humor, passion and enthusiasm which have been contagiously affecting thousands of industry friends over the past 30 years.

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