Calculating Hook Load; One Attachment Point - Textron GREENLEE Ultra Tugger 6800-22 Manual De Operación

Cable Pulling Principles (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.
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.
Greenlee / A Textron Company
6800-22 Ultra Tugger
R
θ
T
Cable Puller and Pulling Package
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