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www.SSMA.com60 Copyright © 2022 by the SSMA <br />1 Bearing length to web height ratio, N/h exceeds limit of 1. <br />2 Bearing length to thickness ratio, N/t exceeds limit of 210. <br />See Table Notes and figures on page 58. <br />Web Crippling Loads <br />Allowable Web Crippling Loads (lbs) - Back-to-Back Members (S-Sections) <br />Section Design Thickness (in) <br />Mil Thickness (mil) <br />Fy (ksi) <br />Condition 1 Fasten to Support Condition 2 Fasten to Support Condition 3 Unfasten to Support Condition 4 Unfasten to Support <br />Bearing Length (in)Bearing Length (in)Bearing Length (in)Bearing Length (in) <br />1 3.5 6 1 3.5 6 1 3.5 6 1 3.5 6 <br />162 0.0188 18 33 247 392 1 488 1, 2 312 434 1 514 1, 2 151 200 1 232 1, 2 305 403 1 468 1, 2 <br />162 0.0283 27 33 535 826 1 1020 1, 2 727 977 1 1144 1, 2 368 472 1 540 1, 2 771 987 1 1131 1, 2 <br />162 0.0312 30 33 642 985 1 1213 1 887 1183 1 1380 1 454 577 1 659 1 957 1216 1 1389 1 <br />162 0.0346 33 33 779 1186 1 1457 1 1094 1448 1 1683 1 565 713 1 812 1 1200 1515 1 1724 1 <br />162 0.0451 43 33 1275 1907 1 2327 1 1867 2422 1 2790 1 988 1223 1 1380 1 2132 2640 1 2978 1 <br />162 0.0566 54 50 2875 4229 1 5128 1 4324 5515 1 6306 1 2377 2898 1 3244 1 5141 6267 1 7016 1 <br />162 0.0713 68 50 4296 6211 1 7484 1 6630 8314 1 9433 1 3787 4548 1 5053 1 8191 9835 1 10928 1 <br />250 0.0188 18 33 247 391 1 487 1, 2 312 432 1 513 1, 2 129 171 1 198 1, 2 261 345 1 400 1, 2 <br />250 0.0283 27 33 534 825 1 1018 1, 2 726 975 1 1141 1, 2 329 421 1 482 1, 2 688 881 1 1010 1, 2 <br />250 0.0312 30 33 641 983 1 1211 1 885 1181 1 1377 1 408 519 1 593 1 861 1094 1 1249 1 <br />250 0.0346 33 33 777 1184 1 1454 1 1092 1445 1 1680 1 512 647 1 736 1 1088 1373 1 1562 1 <br />250 0.0451 43 33 1273 1904 1 2323 1 1864 2418 1 2786 1 910 1127 1 1271 1 1964 2432 1 2743 1 <br />250 0.0566 54 50 2871 4223 1 5121 1 4318 5507 1 6297 1 2213 2698 1 3020 1 4786 5835 1 6532 1 <br />250 0.0713 68 50 4291 6203 1 7474 1 6621 8304 1 9421 1 3557 4271 1 4745 1 7692 9236 1 10263 1 <br />250 0.1017 97 50 8011 11273 1 13440 1 12845 15714 1 17620 1 7342 8624 1 9477 1 15879 18652 1 20495 1 <br />350 0.0188 18 33 246 390 1 486 1, 2 311 432 1 512 1, 2 109 144 1 167 1, 2 220 291 1 338 1, 2 <br />350 0.0283 27 33 533 823 1 1016 1, 2 724 974 1 1139 1, 2 292 374 1 429 1, 2 611 783 1 897 1, 2 <br />350 0.0312 30 33 640 981 1 1208 1 884 1179 1 1375 1 366 465 1 531 1 771 981 1 1120 1 <br />350 0.0346 33 33 776 1182 1 1452 1 1090 1443 1 1677 1 463 585 1 665 1 984 1241 1 1412 1 <br />350 0.0451 43 33 1272 1901 1 2320 1 1861 2414 1 2782 1 838 1037 1 1170 1 1808 2239 1 2525 1 <br />350 0.0566 54 50 2867 4217 1 5114 1 4313 5500 1 6289 1 2062 2514 1 2814 1 4459 5436 1 6085 1 <br />350 0.0713 68 50 4286 6196 1 7466 1 6614 8294 1 9410 1 3346 4018 1 4464 1 7236 8689 1 9654 1 <br />350 0.1017 97 50 8003 11261 1 13427 1 12832 15698 1 17603 1 6986 8206 1 9017 1 15109 17747 1 19501 1 <br />362 0.0188 18 33 246 390 1 486 1, 2 311 431 1 511 1, 2 107 141 1 164 1, 2 215 285 1 330 1, 2 <br />362 0.0283 27 33 533 823 1 1015 1, 2 724 973 1 1139 1, 2 288 369 1 422 1, 2 603 772 1 884 1, 2 <br />362 0.0312 30 33 640 981 1 1208 1 883 1179 1 1375 1 361 459 1 524 1 761 968 1 1105 1 <br />362 0.0346 33 33 776 1182 1 1452 1 1090 1442 1 1677 1 458 578 1 657 1 972 1226 1 1395 1 <br />362 0.0451 43 33 1271 1901 1 2319 1 1861 2414 1 2781 1 830 1027 1 1159 1 1790 2217 1 2501 1 <br />362 0.0566 54 50 2867 4217 1 5113 1 4312 5499 1 6288 1 2045 2493 1 2790 1 4422 5391 1 6035 1 <br />362 0.0713 68 50 4285 6195 1 7465 1 6613 8293 1 9409 1 3322 3989 1 4432 1 7185 8627 1 9585 1 <br />362 0.1017 97 50 8002 11260 1 13425 1 12831 15697 1 17601 1 6946 8159 1 8965 1 15022 17646 1 19389 1 <br />400 0.0283 27 33 533 822 1015 1, 2 724 973 1138 1, 2 276 353 405 1, 2 577 739 847 1, 2 <br />400 0.0312 30 33 639 981 1208 1 883 1178 1374 1 347 441 504 1 732 931 1063 1 <br />400 0.0346 33 33 776 1181 1451 1 1089 1442 1676 1 442 557 634 1 937 1183 1346 1 <br />400 0.0451 43 33 1271 1900 2318 1 1860 2413 2780 1 806 998 1126 1 1739 2154 2429 1 <br />400 0.0566 54 50 2866 4215 5111 1 4310 5497 6285 1 1995 2432 2723 1 4315 5260 5889 1 <br />400 0.0713 68 50 4284 6193 7462 1 6610 8290 9406 1 3253 3906 4340 1 7036 8448 9387 1 <br />400 0.1017 97 50 8000 11256 1 13421 1 12827 15691 1 17595 1 6830 8023 1 8816 1 14772 17352 1 19067 1 <br />550 0.0283 27 33 531 821 1013 1, 2 722 971 1136 1, 2 233 298 341 1, 2 487 624 715 1, 2 <br />550 0.0312 30 33 638 979 1205 1 881 1176 1371 1 298 378 432 1 627 798 911 1 <br />550 0.0346 33 33 774 1179 1448 1 1087 1439 1673 1 384 484 551 1 815 1028 1170 1 <br />550 0.0451 43 33 1269 1897 2314 1 1857 2409 2775 1 721 893 1007 1 1556 1927 2174 1 <br />550 0.0566 54 50 2861 4208 5104 1 4304 5488 6276 1 1818 2217 2482 1 3933 4794 5367 1 <br />550 0.0713 68 50 4278 6185 7452 1 6601 8278 9393 1 3008 3612 4013 1 6506 7812 8680 1 <br />550 0.1017 97 50 7990 11243 13405 1 12812 15673 17575 1 6421 7543 8288 1 13888 16313 17925 1 <br />600 0.0312 30 33 638 978 1204 1, 2 881 1175 1370 1, 2 283 359 410 1, 2 596 757 865 1, 2 <br />600 0.0346 33 33 774 1178 1447 1 1086 1438 1672 1 366 462 526 1 778 982 1117 1 <br />600 0.0451 43 33 1268 1896 2313 1 1856 2408 2774 1 696 862 972 1 1501 1859 2097 1 <br />600 0.0566 54 50 2860 4207 5101 1 4302 5486 6273 1 1765 2152 2409 1 3818 4654 5210 1 <br />600 0.0713 68 50 4276 6182 7449 1 6599 8275 9389 1 2935 3524 3915 1 6347 7621 8467 1 <br />600 0.1017 97 50 7988 11240 13401 1 12808 15668 17569 1 6299 7399 8130 1 13623 16002 17583 1 <br />600 0.1242 118 50 11392 15784 18703 1 18650 22513 25081 1 9616 11165 12195 1 20797 24147 26374 1 <br />800 0.0451 43 33 1266 1892 2309 1853 2403 2769 603 747 843 1302 1613 18198000.0566 54 50 2855 4200 5093 4295 5477 6263 1573 1918 2147 3402 4148 4643 <br />800 0.0713 68 50 4270 6173 7438 6589 8263 9375 2669 3205 3561 5772 6931 7701 <br />800 0.1017 97 50 7978 11226 13384 12792 15649 17547 5859 6882 7562 12671 14883 163548000.1242 118 50 11379 15766 18682 18629 22488 25052 9028 10482 11449 19524 22670 24760 <br />1000 0.0566 54 50 2851 4194 5086 4288 5469 6254 1405 1713 1917 3038 3704 414610000.0713 68 50 4264 6165 7428 6580 8252 9363 2437 2926 3251 5270 6327 703010000.1017 97 50 7969 11213 13369 12778 15631 17528 5474 6430 7065 11839 13906 1528010000.1242 118 50 11368 15751 18663 18610 22466 25027 8515 9887 10798 18416 21383 23354 <br />1200 0.0713 68 50 4259 6158 7419 6573 8243 9352 2227 2674 2971 4817 5784 642612000.1017 97 50 7961 11202 13356 12765 15616 17511 5128 6024 6619 11091 13028 1431512000.1242 118 50 11358 15737 18647 18594 22446 25005 8055 9352 10215 17420 20227 22091 <br />1400 0.0713 68 50 4255 6151 7411 6566 8234 9342 2035 2444 2715 4401 5285 587214000.1017 97 50 7954 11192 13344 12754 15602 17495 4811 5651 6210 10405 12223 1343014000.1242 118 50 11349 15724 18631 18579 22427 24985 7633 8863 9680 16509 19168 20936 <br />1600 0.1017 97 50 7947 11183 13333 12743 15589 17480 4517 5306 5830 9769 11475 1260916000.1242 118 50 11340 15712 18617 18565 22410 24966 7242 8409 9184 15663 18187 19864