Counter Weight Formula

W = Counterweight 
L = Load Capacity Of Hoist 
a = Arm Reach 
b = Backspan Distance (Distance between the fulcrum point and the center of the counterweights) 
4 = Safety Factor (4: 1)


Note: Counterweights must be a nonflowable material, and they must be attached to the outrigger beam


Always use taut tieback wire ropes capable of holding the full load.


W = (La)4/b


© Copyright Scaffold Industry Association, Inc. 1996

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