Tension Increase in Ropes due to Angle

Load capacity loss in ropes, cables or lines due to angle

rope cable line angle tension capacity loss

The increased tension in a rope or cable can be estimated with the table below:

Rope Angle with Load (degrees) Increased Tension Factor
α β
0 90 1.000
5 85 1.004
10 80 1.015
15 75 1.035
20 70 1.065
25 65 1.103
30 60 1.155
35 55 1.221
40 50 1.305
45 45 1.414
50 40 1.556
55 35 1.743
60 30 2.000
65 25 2.366
70 20 2.924
75 15 3.864
80 10 5.759
85 5 11.47

With α angle 60 degrees and β angle 30 degrees the tension is increased twice. 

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