Example:
Vertical choker rating each sling  6000 lbs.
Measured Length (L) = 6 ft.
Measured Height (H)= 4 ft.
Reduction Factor (RF) 4(H) ÷ 6(L) = .667
Reduced sling rating in configuration = .667
(RF) x 6,000 lbs. = 4,000 lbs. of lifting
capacity per sling


Example:
Load weight = 1000 lbs.
Rigging  2 slings in vertical hitch
Lifting
Weight (LW) per sling  500 lbs.
Measured Length (l)  10 ft.
Measured Height (h)  5 ft.
Tension Factor (TF)= 10(L)
÷ 5(h)= 2.0
Minimum Vertical Rated Capacity required for this lift = 500(LW) x 2.0(TF) = 1000 lbs. per sling

STEPS TO CONSIDER WHEN CALUCLATING SLING ANGLES
1.Calculate the Reduction Factor (RF)
a. Using the angle from horizontal, read across the Angle Chart to the corresponding number of the Reduction Factor column.
 OR 
b. Divide sling height* (H) by sling Length* (L).
2. Reduction Factor (RF) x the sling's rated capacity for the type hitch that will be used  Sling's Reduced Rating.

STEPS TO DETERMINE NECESSARY SLING CAPACITY
1. Determine the weight that the sling will be lifting (LW)
2. Calculate the Tension factor (TF).
a. Using the angle from horizontal, read across the angle chart to the corresponding number of Tension Factor column
b. Divide sling length*(L) by sling height*(H)
 OR

3.Lifting Weight (LW) x the Tension Factor (TF)= Minimum Sling Rating for the type of hitch that will be used.
*Measured from a common horizontal plane to the hoisting hook.
