| Rope Diameter | Minimum Breaking Strength | Safe Load (Safety Factor 12) |
Weight | ||||
|---|---|---|---|---|---|---|---|
| (in) | (mm) | (lbf) | (kN) | (lbf) | (kN) | (lbm/ft) | (kg/m) |
| 1/4 | 6 | 1125 | 5.00 | 93.8 | 0.417 | 0.01 | 0.02 |
| 5/16 | 8 | 1710 | 7.61 | 143 | 0.634 | 0.02 | 0.03 |
| 3/8 | 10 | 2430 | 10.8 | 203 | 0.90 | 0.03 | 0.04 |
| 7/16 | 11 | 3150 | 14.0 | 263 | 1.17 | 0.04 | 0.05 |
| 1/2 | 12 | 3780 | 16.8 | 315 | 1.40 | 0.05 | 0.07 |
| 9/16 | 14 | 4590 | 20.4 | 383 | 1.70 | 0.06 | 0.09 |
| 5/8 | 16 | 5580 | 24.8 | 465 | 2.07 | 0.07 | 0.11 |
| 3/4 | 18 | 7650 | 34.0 | 638 | 2.84 | 0.10 | 0.15 |
| 7/8 | 22 | 10350 | 46.0 | 863 | 3.84 | 0.14 | 0.21 |
| 1 | 24 | 12825 | 57.0 | 1070 | 4.76 | 0.18 | 0.27 |
| 1 1/16 | 26 | 14400 | 64.1 | 1200 | 5.34 | 0.20 | 0.30 |
| 1 1/8 | 28 | 16000 | 71.2 | 1330 | 5.92 | 0.23 | 0.34 |
| 1 1/4 | 30 | 19350 | 86.1 | 1610 | 7.16 | 0.28 | 0.41 |
| 1 3/8 | 32 | 21150 | 94.1 | 1760 | 7.83 | 0.30 | 0.45 |
| 1 1/2 | 36 | 27350 | 122 | 2280 | 10.1 | 0.39 | 0.59 |
| 1 5/8 | 40 | 31950 | 142 | 2660 | 11.8 | 0.46 | 0.68 |
| 1 3/4 | 44 | 36900 | 164 | 3080 | 13.7 | 0.53 | 0.79 |
| 2 | 48 | 46800 | 208 | 3900 | 17.3 | 0.69 | 1.03 |
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