Greenlee G6 Turbo Manual De Instrucciones página 18

Cable Pulling Principles (cont'd)
Cable Pulling Forces (cont'd)
At the Sheaves
Sheaves are used to change the direction of the pull.
A change in direction creates a new resultant force
that may be greater than the cable puller's maximum
pulling force. This new resultant force exerts itself on the
sheaves, sheave anchoring system, and support struc-
tures illustrated.
The resultant amount of force depends on the angle of
the change in direction. A brief table is provided here;
For details on calculating the resultant force for any
angle, refer to IM 1363 (99929988).
Greenlee Inc.
Resultant Force Table
(6000 lb or 26.7 kN Pulling Force)
135°
Resultant Force
4600 lb (20.4 kN)
Typical Resultant Force at Sheave
18
Angle of Change
Illustration
in Direction
180°
150°
135°
120°
90°
60°
45°
30°
0°
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
G6 Turbo™
Resultant Force
in lb (kN)
0 (0)
3100 (13.8)
4600 (20.4)
6000 (26.7)
8500 (37.8)
10,400 (46.3)
11,100 (49.3)
11,600 (51.6)
12,000 (53.4)