4024, 4036, and 4048 Conveyor Sheaves
Greenlee / A Textron Company
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
5
Hook Load
(cont’d)
Some Hook Loads Illustrated
Hook Load
Hook Load = Total Pulling Force
0
1
2
180°
120°
0
1
2
A straight rope exerts no load on the hook and
structure.
A rope that makes a 120° angle exerts the total
pulling force on the hook and structure.
Hook Load = 1/2 of the Pulling Force
Hook Load = 1-1/2 Times the Pulling Force
150°
0
1
2
90°
0
1
2
A rope that makes a 150° angle exerts 1/2 of the
pulling force on the hook and structure.
A rope that makes a 90° angle exerts 1-1/2 times the
pulling force on the hook and structure.
Hook Load = 3/4 of the Pulling Force
Hook Load = 2 Times the Pulling Force
135°
0
1
2
0°
0
1
2
A rope that makes a 135° angle exerts 3/4 of the
pulling force on the hook and structure.
A rope that makes a 0° angle exerts 2 times the
pulling force on the hook and structure.
