Hook Load - Textron Greenlee Ultra Tugger 15000-22 Manual De Instrucciones

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
Ultra Tugger
R
θ
T
® Cable Puller and Pulling Packages
Reference Table
Illustration
R = 0
T
R = 1.41 x T
T
R = 2 x T
T T
22
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θ θ θ θ θ
180°
T
150° .52 x T
135° .77 x T
120° 1 x T
90° 1.41 x T
T
60° 1.73 x T
45° 1.85 x T
30° 1.93 x T
0° 2 x T
R
0