Nylon Rope - Strength

Nylon 3-strand and 8-strand rope - minimum breaking strength and safe load

Nylon rope is made from continuous filament polyamide - nylon 6 or nylon 6.6.

nylon rope strength

Minimum breaking strength and safe load for nylon rope:

Rope DiameterMinimum Breaking StrengthSafe Load
(Safety Factor 12)
Weight
(in)(mm)(lbf)(kN)(lbf)(kN)(lbm/ft)(kg/m)
3/16 5 880 3.91 73.3 0.326 0.009 0.013
1/4 6 1486 6.61 124 0.551 0.016 0.023
5/16 8 2295 10.2 191 0.851 0.025 0.036
3/8 10 3240 14.4 270 1.20 0.036 0.053
7/16 11 4320 19.2 360 1.60 0.048 0.071
1/2 12 5670 25.2 473 2.10 0.063 0.094
9/16 14 7200 32.0 600 2.67 0.080 0.119
5/8 16 8910 39.6 743 3.30 0.099 0.147
3/4 18 12780 56.8 1070 4.76 0.143 0.213
7/8 22 17280 76.9 1440 6.41 0.195 0.290
1 24 22230 98.9 1850 8.23 0.253 0.377
1 1/16 26 25200 112 2100 9.34 0.287 0.427
1 1/8 28 28260 126 2360 10.5 0.322 0.479
1 1/4 30 34830 155 2900 12.9 0.397 0.591
1 3/8 32 38250 170 3190 14.2 0.437 0.650
1 1/2 36 48600 216 4050 18.0 0.570 0.848
1 5/8 40 57375 255 4780 21.3 0.673 1.00
1 3/4 44 66150 294 5510 24.5 0.780 1.16
2 48 84600 376 7050 31.4 1.00 1.49

Example - Maximum Safe Mass for a 3/8" Nylon Rope

The relationship between mass and force (weight) can be expressed as

m = F / g    (1)

where 

F = force, weight (N)

m = mass (kg)

g = acceleration of gravity (9.81 m/s2

Maximum safe mass for a 3/8" nylon rope where safe load is 1.2 kN can be calculated as

m = (1.2 103 N) / (9.81 m/s2)

   =  122 kg 

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