Hook Load - Textron GREENLEE Ultra Tugger 6800-22 Manual De Operación

Cable Pulling Principles (cont'd)
Calculating the Hook Load (cont'd)

Hook Load

Two variables interact with the sheave to produce a
resultant (total) force, or hook load. This load, repre-
sented by R in the formulas and illustrations, is exerted
on the hook, anchoring, and structural support.
T
R – the resultant force, or hook load; this force is
exerted on the hook, anchoring and structural
support
θ – the angle of change in rope direction
T – the tension exerted on the rope by the cable
puller
Sheave Forces
Greenlee / A Textron Company
6800-22 Ultra Tugger
R
θ
T
Cable Puller and Pulling Package
®
Reference Table
Illustration
R = 0
T T
R = 1.41 x T
T T
R = 2 x T
T T
22
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R
θ
180° 0
150° 0.52 x T
135° 0.77 x T
120° 1 x T
90° 1.41 x T
60° 1.73 x T
45° 1.85 x T
30° 1.93 x T
0° 2 x T