introduCtion Welded Wire Fabric Spacings and sizes of wires in welded wire fabric are identified by style designation. A typical style designation is 2 x 8 — W4 x W2.5. This denotes a welded wire fabric in which: Spacing of longitudinal wires = 51 mm (2 inches) 3 Density = 203 7847 kg/m 1 kg = 2.204 Spacing of transverse wiresof Steel = mm (8 inches) Rebar: Size of longitudinal wires (W4) = 26 mm2 (0.04 square inches) As mm2/m Size of transverse wires (W2.5) = 16 mm2 (0.025 square inches) Rebar Size 100 150 200 250 300 350 400 450 500 550 10M 1000 666.7 500 400 333.3 285.7 250 222.2 200 ConCrete pipe Table for Area of Steel vs Spacing (Page 1 of 2) lb 1 ft = 0.3048 Rebar As m Nominal  (mm) 11.3 16 19.5 25.2 Nominal Weight kg/m 0.785 1.57 2.355 3.925 600 650 700 mm2 100 200 300 500 The table below2000 1333 1000 typical steel reinforcement 400 363.6 333.3 307.7utilized. illustrates the 800 666.7 571.4 500 444.4 designation styles 285.7 15M Depending on availability and production857.1 750 666.7 600 545.5 500 461.5 428.6 20M 3000 2000 1500 1200 1000 capabilities, different manufacturers may 5000 3333 2500 2000 1667 1429 1250 1111 1000 909.1 833.3 769.2 714.3 utilize25M different alignments. Metric: Wire Size Plain W45 W31 W20 W18 W17.5 W17 W16.5 W16 W15.5 W15 W14.5 W14 W13.5 W13 W12.5 W12 W11.5 W11 W10.5 W10 W9.5 W9 W8.5 W8 W7.5 W7 W6.5 W6 W5.5 W5 W4.5 W4 W3.5 W3 W2.9 W2.5 W2 W1.4 D4 D5 D6 D7 D8 D9 D10 D11 D12 D14 D16 Def. D45 D31 D20 D18 As mm2/m 2 51 3 76 4 102 5 127 6 152 (spacing in inches, millimeters) 7 178 8 203 983 636 572 556 539 523 507 492 476 461 444 429 413 397 381 366 349 334 318 302 285 270 254 238 223 207 190 175 158 142 127 111 95 92 79 64 45 9 229 874 565 509 494 479 465 451 437 423 410 395 382 367 353 339 325 310 297 282 268 253 240 226 212 198 184 169 156 141 127 113 99 84 82 70 57 40 10 254 787 509 458 444 431 418 406 393 381 369 355 344 330 318 305 293 279 267 254 242 228 216 203 190 178 165 152 140 127 114 102 89 76 74 63 51 36 11 279 715 463 416 404 392 380 369 358 346 335 323 312 300 289 277 266 254 243 231 220 207 196 185 173 162 150 138 127 115 104 93 81 69 67 57 46 33 12 305 953 656 424 381 370 359 349 338 328 317 307 296 286 275 265 254 244 233 223 212 201 190 180 169 159 149 138 127 117 106 95 85 74 63 61 53 43 30 13 330 879 605 391 352 342 332 322 312 303 293 284 273 264 254 244 235 225 215 206 196 186 175 166 156 147 137 127 117 108 97 88 78 68 58 57 49 39 28 14 356 817 562 363 327 317 308 299 290 281 272 263 254 245 236 227 218 209 199 191 182 173 163 154 145 136 127 118 109 100 90 81 73 63 54 53 45 36 26 181.8 166.7 153.8 142.9 Wire As mm2 290 200 129 116 113 110 106 103 100 97 94 90 87 84 81 77 74 71 68 65 61 58 55 52 48 45 42 39 36 32 29 26 23 19 19 16 13 9 Nominal  (in) (mm) Nominal Weight lbs/ft 1.531 1.053 0.681 0.613 0.595 0.578 0.560 0.543 0.527 0.510 0.494 0.476 0.460 0.442 0.425 0.408 0.392 0.374 0.358 0.340 0.323 0.305 0.289 0.272 0.255 0.239 0.222 0.203 0.188 0.170 0.153 0.136 0.119 0.102 0.098 0.085 0.068 0.048 kg/m 2.279 1.568 1.014 0.912 0.886 0.860 0.834 0.809 0.784 0.759 0.735 0.708 0.685 0.659 0.633 0.608 0.583 0.556 0.533 0.507 0.482 0.454 0.430 0.405 0.380 0.355 0.330 0.303 0.279 0.253 0.227 0.203 0.177 0.151 0.147 0.126 0.102 0.071 stormwater treatment teChnologies 5716 3811 2858 2286 1905 1633 1429 1270 1143 1039 3934 2623 1967 1574 1311 1124 2544 1696 1272 1018 2289 1526 1144 2222 1481 1111 2157 1438 1078 2092 1395 1046 2029 1353 1014 1966 1311 1905 1270 1844 1230 1776 1184 1718 1145 1652 1102 1588 1059 1525 1017 1463 1395 1336 1271 1208 1140 1080 1015 952 892 827 760 700 633 570 509 444 379 368 316 255 179 975 930 891 847 805 760 720 677 635 594 552 507 467 422 380 340 296 253 245 211 170 119 983 952 922 888 859 826 794 762 732 698 668 636 604 570 540 508 476 446 414 380 350 317 285 255 222 190 184 158 128 90 915 889 863 837 812 787 762 738 711 687 661 635 610 585 558 534 508 483 456 432 406 381 357 331 304 280 253 228 204 178 152 147 126 102 72 848 763 741 719 697 676 655 635 615 592 573 551 529 508 488 465 445 424 403 380 360 338 317 297 276 253 233 211 190 170 148 126 123 105 85 60 727 654 635 616 598 580 562 544 527 508 491 472 454 436 418 399 382 363 345 326 308 290 272 255 236 217 200 181 163 146 127 108 105 90 73 51 0.757 19.23 0.628 15.95 0.505 12.83 0.479 12.17 0.472 11.99 0.465 11.81 0.458 11.63 0.451 11.46 0.444 11.28 0.437 11.10 0.430 10.92 0.422 10.72 0.415 10.54 0.407 10.34 0.399 10.13 0.391 0.383 0.374 0.366 0.357 0.348 0.338 0.329 0.319 0.309 0.299 0.288 0.276 0.265 0.252 0.239 0.226 0.211 0.195 0.192 0.178 0.160 0.134 9.93 9.73 9.50 9.30 9.07 8.84 8.59 8.36 8.10 7.85 7.59 7.32 7.01 6.73 6.40 6.07 5.74 5.36 4.95 4.88 4.52 4.06 3.40 box seCtions manhole and CatCh basin material LAFARGE PIPE eMANUAL PAGE 17