● core: steel core
● strand: warrington-Seale
● main hoist rope for tower crane, crawler crane, mobile crane, gantry crane, truck crane etc.
The 6×31WS-IWRC is a wire rope featuring an Independent Wire Rope Core (IWRC) and a Warrington-Seale (WS) hybrid construction—a line-contact design that excels in heavy-duty and demanding operating conditions.
The WS hybrid construction balances wear resistance with excellent flexibility; the line-contact arrangement between wires ensures more uniform stress distribution and significantly enhances wear resistance, while simultaneously eliminating relative sliding between internal wires to provide superior fatigue resistance.
The core consists of an independent wire rope (typically a 7×7 construction). Acting as the "backbone" of the entire assembly, the steel core provides robust internal support, high tensile strength, and superior resistance to crushing.
| Nominal diameter (mm) |
Approx. weight (kg/100m) |
Minimum breaking force (kN) | ||
| 1770 | 1960 | 2160 | ||
| 8 | 26.8 | 40.3 | 44.7 | 49.2 |
| 9 | 33.9 | 51.0 | 56.5 | 62.3 |
| 9.53 | 38.0 | 57.2 | 63.4 | 69.8 |
| 10 | 41.8 | 63.0 | 69.8 | 76.9 |
| 11 | 50.6 | 76.2 | 84.4 | 93.0 |
| 12 | 60.2 | 90.7 | 100 | 111 |
| 12.7 | 67.4 | 101.6 | 113 | 124 |
| 13 | 70.6 | 106 | 118 | 130 |
| 14 | 81.9 | 124 | 137 | 151 |
| 14.3 | 85.5 | 129 | 143 | 157 |
| 15.9 | 106 | 159 | 176 | 194 |
| 16 | 107 | 161 | 179 | 197 |
| 18 | 135 | 204 | 226 | 249 |
| 19 | 151 | 227 | 252 | 278 |
| 20 | 167 | 252 | 279 | 308 |
| 22 | 202 | 305 | 338 | 372 |
| 22.2 | 206 | 311 | 344 | 379 |
| 24 | 241 | 363 | 402 | 443 |
| 25.4 | 270 | 407 | 450 | 496 |
| 26 | 283 | 426 | 472 | 520 |
| 28 | 328 | 494 | 547 | 603 |
| 28.6 | 342 | 515 | 571 | 629 |
| 30 | 376 | 567 | 628 | 692 |
| 32 | 428 | 645 | 715 | 787 |
| 36 | 542 | 817 | 904 | 997 |
| 40 | 669 | 1010 | 1120 | 1230 |
| 44 | 809 | 1220 | 1350 | 1490 |
| 48 | 963 | 1450 | 1610 | 1770 |
| 52 | 1130 | 1700 | 1890 | 2080 |
| 56 | 1310 | 1980 | 2190 | 2410 |
| 60 | 1500 | 2270 | 2510 | 2770 |