6036 Triple Sheave
Greenlee / A Textron Company
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
7
Hook Load
(cont’d)
Calculating the Hook Load
One Attachment Point
To calculate the hook load exerted at one attachment
point, use the Reference Table and Formula 1.
R
T
T
Sheave with One Attachment Point
Formula 1:
R = 2 x T x SIN [(180 –
θ
) / 2]
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
Note: The total load on the support structure = R + the weight of the sheave.
