Properties - Cold-Formed Rectangular Hollow Sections

Welcome to our Cold-Formed Rectangular Hollow Section properties page! Here you'll find properties for all UK Cold-Formed Rectangular Hollow Section steel sections described by the Steelwork Design Guide to BS5950-1:2000, Volume 1, Section Properties, Member Capacities, 7th Edition (also known as The Blue Book). Sort the table below according to any property and select a CAD file to download using the reference links in the left-most column. You can also purchase all our CAD data in one easy download, containing the sections as individual files and AutoCAD Design Center files or Microstation cel libraries - just click on the Shop button in the navigation above.

Section Reference Ratios for Local Buckling Second Moment of Area Radius of Gyration Elastic Modulus Plastic Modulus Torsional Constants Surface Area
      Axis
x-x
Axis
y-y
Axis
x-x
Axis
y-y
Axis
x-x
Axis
yy
Axis
x-x
Axis
y-y
    Per Metre Per Tonne
  d/t(1) b/t(1) cm4 cm4 cm cm cm3 cm3 cm3 cm3 J
cm4
C
cm3
m2 m2
50x25x2.0 20 7.5 8.38 2.81 1.75 1.01 3.35 2.25 4.26 2.62 7.06 3.92 0.143 66.6
50x25x3.0 11.7 3.33 11.2 3.67 1.69 0.969 4.47 2.93 5.86 3.56 9.64 5.18 0.14 45.5
50x30x2.5 15 7 11.3 5.05 1.77 1.19 4.52 3.37 5.7 3.98 11.7 5.72 0.151 53.7
50x30x3.0 11.7 5 12.8 5.7 1.75 1.16 5.13 3.8 6.57 4.58 13.5 6.49 0.15 45.3
50x30x4.0 7.5 2.5 15.3 6.69 1.69 1.12 6.1 4.46 8.05 5.58 16.5 7.71 0.146 34.8
60x30x3.0 15 5 20.5 6.8 2.06 1.19 6.83 4.53 8.82 5.39 17.5 7.95 0.17 45
60x30x4.0 10 2.5 24.7 8.06 2 1.14 8.23 5.37 10.9 6.62 21.5 9.52 0.166 34.5
60x40x3.0 15 8.33 25.4 13.4 2.17 1.58 8.46 6.72 10.5 7.94 29.3 11.2 0.19 44.7
60x40x4.0 10 5 31 16.3 2.11 1.53 10.3 8.14 13.2 9.89 36.7 13.7 0.186 34.2
60x40x5.0 7 3 35.3 18.4 2.06 1.48 11.8 9.21 15.4 11.5 42.8 15.6 0.183 27.9
70x40x3.0 18.3 8.33 37.3 15.5 2.49 1.61 10.7 7.75 13.4 9.05 36.5 13.2 0.21 44.5
70x40x4.0 12.5 5 46 18.9 2.44 1.56 13.1 9.44 16.8 11.3 45.8 16.2 0.206 33.9
70x50x3.0 18.3 11.7 44.1 26.1 2.58 1.99 12.6 10.4 15.4 12.2 53.6 17.1 0.23 44.3
70x50x4.0 12.5 7.5 54.7 32.2 2.53 1.94 15.6 12.9 19.5 15.4 68.1 21.2 0.226 33.7
80x40x3.0 21.7 8.33 52.3 17.6 2.81 1.63 13.1 8.78 16.5 10.2 43.9 15.3 0.23 44.3
80x40x4.0 15 5 64.8 21.5 2.75 1.59 16.2 10.7 20.9 12.8 55.2 18.8 0.226 33.7
80x40x5.0 11 3 75.1 24.6 2.69 1.54 18.8 12.3 24.7 15 65 21.7 0.223 27.4
80x50x3.0 21.7 11.7 61.1 29.4 2.91 2.02 15.3 11.8 18.8 13.6 65 19.7 0.25 44.1
80x50x4.0 15 7.5 76.4 36.5 2.86 1.98 19.1 14.6 24 17.2 82.7 24.6 0.246 33.6
80x50x5.0 11 5 89.2 42.3 2.8 1.93 22.3 16.9 28.5 20.5 98.4 28.7 0.243 27.2
80x60x3.0 21.7 15 70 44.9 3 2.4 17.5 15 21.2 17.4 88.3 24.1 0.27 44
80x60x4.0 15 10 87.9 56.1 2.94 2.35 22 18.7 27 22.1 113 30.3 0.266 33.4
80x60x5.0 11 7 103 65.7 2.89 2.31 25.8 21.9 32.2 26.4 136 35.7 0.263 27.1
90x50x3.0 25 11.7 81.9 32.7 3.24 2.05 18.2 13.1 22.6 15 76.7 22.4 0.27 44
90x50x4.0 17.5 7.5 103 40.7 3.18 2 22.8 16.3 28.8 19.1 97.7 28 0.266 33.4
90x50x5.0 13 5 121 47.4 3.12 1.96 26.8 18.9 34.4 22.7 116 32.7 0.263 27.1
100x40x3.0 28.3 8.33 92.3 21.7 3.44 1.67 18.5 10.8 23.7 12.4 59 19.4 0.27 44
100x40x4.0 20 5 116 26.7 3.38 1.62 23.1 13.3 30.3 15.7 74.5 24 0.266 33.4
100x40x5.0 15 3 136 30.8 3.31 1.58 27.1 15.4 36.1 18.5 87.9 27.9 0.263 27.1
100x50x3.0 28.3 11.7 106 36.1 3.56 2.07 21.3 14.4 26.7 16.4 88.6 25 0.29 43.9
100x50x4.0 20 7.5 134 44.9 3.5 2.03 26.8 18 34.1 20.9 113 31.3 0.286 33.3
100x50x5.0 15 5 158 52.5 3.44 1.98 31.6 21 40.8 25 135 36.8 0.283 27
100x50x6.0 11.7 3.33 179 58.7 3.38 1.94 35.8 23.5 46.9 28.5 154 41.4 0.279 22.8
100x60x3.0 28.3 15 121 54.6 3.66 2.46 24.1 18.2 29.6 20.8 122 30.6 0.31 43.8
100x60x3.5 23.6 12.1 137 61.9 3.63 2.44 27.4 20.6 33.8 23.8 139 34.8 0.308 37.7
100x60x4.0 20 10 153 68.7 3.6 2.42 30.5 22.9 37.9 26.6 156 38.7 0.306 33.2
100x60x5.0 15 7 181 80.8 3.55 2.37 36.2 26.9 45.6 31.9 188 45.8 0.303 26.9
100x60x6.0 11.7 5 205 91.2 3.49 2.33 41.1 30.4 52.5 36.6 216 51.9 0.299 22.7
100x80x3.0 28.3 21.7 149 106 3.82 3.22 29.8 26.4 35.4 30.4 196 41.9 0.35 43.6
100x80x4.0 20 15 189 134 3.77 3.17 37.9 33.5 45.6 39.2 254 53.4 0.346 33
100x80x5.0 15 11 226 160 3.72 3.12 45.2 39.9 55.1 47.2 308 63.7 0.343 26.7
120x40x3.0 35 8.33 148 25.8 4.05 1.69 24.7 12.9 32.2 14.6 74.6 23.5 0.31 43.8
120x40x4.0 25 5 187 31.9 3.99 1.65 31.1 15.9 41.2 18.5 94.2 29.2 0.306 33.2
120x40x5.0 19 3 221 36.9 3.92 1.6 36.8 18.5 49.4 22 111 34.1 0.303 26.9
120x60x3.0 35 15 189 64.4 4.3 2.51 31.5 21.5 39.2 24.2 156 37.1 0.35 43.6
120x60x3.5 29.3 12.1 216 73.1 4.28 2.49 35.9 24.4 44.9 27.7 179 42.2 0.348 37.6
120x60x4.0 25 10 241 81.2 4.25 2.47 40.1 27.1 50.5 31.1 201 47 0.346 33
120x60x5.0 19 7 287 96 4.19 2.42 47.8 32 60.9 37.4 242 55.8 0.343 26.7
120x60x6.0 15 5 328 109 4.13 2.38 54.7 36.3 70.6 43.1 280 63.6 0.339 22.5
120x80x4.0 25 15 295 157 4.44 3.24 49.1 39.3 59.8 45.2 331 64.9 0.386 32.9
120x80x5.0 19 11 353 188 4.39 3.2 58.9 46.9 72.4 54.7 402 77.8 0.383 26.6
120x80x6.0 15 8.33 406 215 4.33 3.15 67.7 53.8 84.3 63.5 469 89.4 0.379 22.3
120x80x8.0 10 5 476 252 4.18 3.04 79.3 62.9 102 76.9 584 108 0.366 17.1
140x80x3.0 41.7 21.7 334 141 5.15 3.35 47.8 35.3 58.2 39.6 317 59.7 0.43 43.4
140x80x4.0 30 15 430 180 5.1 3.3 61.4 45.1 75.5 51.3 412 76.5 0.426 32.8
140x80x5.0 23 11 517 216 5.04 3.26 73.9 54 91.8 62.2 501 91.8 0.423 26.5
140x80x6.0 18.3 8.33 597 248 4.98 3.21 85.3 62 107 72.4 584 106 0.419 22.2
140x80x8.0 12.5 5 708 293 4.82 3.1 101 73.3 131 88.4 731 129 0.406 17
140x80x10.0 9 3 804 330 4.69 3.01 115 82.6 152 103 851 147 0.397 13.8
150x100x3.0 45 28.3 461 248 5.65 4.15 61.4 49.5 73.5 55.8 507 81.4 0.49 43.3
150x100x4.0 32.5 20 595 319 5.6 4.1 79.3 63.7 95.7 72.5 662 105 0.486 32.7
150x100x5.0 25 15 719 384 5.55 4.05 95.9 76.8 117 88.3 809 127 0.483 26.3
150x100x6.0 20 11.7 835 444 5.5 4.01 111 88.8 137 103 948 147 0.479 22.1
150x100x8.0 13.8 7.5 1010 536 5.35 3.9 134 107 169 128 1210 182 0.466 16.8
150x100x10.0 10 5 1160 614 5.22 3.8 155 123 199 150 1430 211 0.457 13.7
160x80x4.0 35 15 598 204 5.74 3.35 74.7 50.9 92.9 57.4 494 88 0.466 32.7
160x80x5.0 27 11 722 244 5.68 3.3 90.2 61 113 69.7 601 106 0.463 26.4
160x80x6.0 21.7 8.33 836 281 5.62 3.26 105 70.2 132 81.3 702 122 0.459 22.1
160x80x8.0 15 5 1000 335 5.46 3.16 125 83.7 163 100 882 150 0.446 16.9
180x80x4.0 40 15 802 227 6.37 3.39 89.1 56.7 112 63.5 578 99.6 0.506 32.7
180x80x5.0 31 11 971 272 6.31 3.34 108 68.1 137 77.2 704 120 0.503 26.3
180x80x6.0 25 8.33 1130 314 6.25 3.3 125 78.5 160 90.2 823 139 0.499 22.1
180x80x8.0 17.5 5 1360 377 6.08 3.2 151 94.1 198 111 1040 170 0.486 16.8
180x80x10.0 13 3 1570 429 5.94 3.1 174 107 234 131 1210 196 0.477 13.6
180x100x4.0 40 20 926 374 6.59 4.18 103 74.8 126 84 854 127 0.546 32.6
180x100x5.0 31 15 1120 452 6.53 4.14 125 90.4 154 103 1050 154 0.543 26.2
180x100x6.0 25 11.7 1310 524 6.48 4.1 146 105 181 120 1230 179 0.539 22
180x100x8.0 17.5 7.5 1600 637 6.32 3.99 178 127 226 150 1570 222 0.526 16.7
180x100x10.0 13 5 1860 736 6.19 3.89 207 147 268 177 1860 260 0.517 13.6
200x100x4.0 45 20 1200 411 7.23 4.23 120 82.2 148 91.7 985 142 0.586 32.5
200x100x5.0 35 15 1460 497 7.17 4.19 146 99.4 181 112 1210 172 0.583 26.2
200x100x6.0 28.3 11.7 1700 577 7.12 4.14 170 115 213 132 1420 200 0.579 21.9
200x100x8.0 20 7.5 2090 705 6.95 4.04 209 141 267 165 1810 250 0.566 16.7
200x100x10.0 15 5 2440 818 6.82 3.94 244 164 318 195 2150 292 0.557 13.5
200x120x4.0 45 25 1350 618 7.43 5.02 135 103 164 115 1350 172 0.626 32.5
200x120x5.0 35 19 1650 750 7.37 4.97 165 125 201 141 1650 210 0.623 26.1
200x120x6.0 28.3 15 1930 874 7.32 4.93 193 146 237 166 1950 245 0.619 21.9
200x120x8.0 20 10 2390 1080 7.17 4.82 239 180 298 209 2510 308 0.606 16.6
200x120x10.0 15 7 2810 1260 7.04 4.72 281 210 356 250 3010 364 0.597 13.4
200x150x4.0 45 32.5 1580 1020 7.67 6.16 158 136 187 154 1940 219 0.686 32.4
200x150x5.0 35 25 1940 1250 7.62 6.11 193 166 230 189 2390 267 0.683 26.1
200x150x6.0 28.3 20 2270 1460 7.56 6.06 227 194 271 223 2830 313 0.679 21.8
200x150x8.0 20 13.8 2830 1820 7.43 5.95 283 242 344 283 3670 396 0.666 16.5
200x150x10.0 15 10 3350 2140 7.31 5.85 335 286 413 339 4430 471 0.657 13.4
250x150x5.0 45 25 3300 1510 9.28 6.27 264 201 320 225 3290 337 0.783 26
250x150x6.0 36.7 20 3890 1770 9.23 6.23 311 236 378 266 3890 396 0.779 21.8
250x150x8.0 26.3 13.8 4890 2220 9.08 6.12 391 296 482 340 5050 504 0.766 16.5
250x150x10.0 20 10 5830 2630 8.96 6.02 466 351 582 409 6120 602 0.757 13.3
250x150x12.0 15.8 7.5 6460 2930 8.77 5.9 517 390 658 463 7090 684 0.738 11.2
250x150x12.5 15 7 6630 3000 8.73 5.87 531 400 678 477 7320 704 0.736 10.8
300x100x6.0 45 11.7 4780 842 10.2 4.3 318 168 411 188 2400 306 0.779 21.8
300x100x8.0 32.5 7.5 5980 1050 10 4.2 399 209 523 238 3080 385 0.766 16.5
300x100x10.0 25 5 7110 1220 9.9 4.11 474 245 631 285 3680 455 0.757 13.3
300x100x12.5 19 3 8010 1370 9.59 3.97 534 275 732 330 4290 521 0.736 10.8
300x200x6.0 45 28.3 7370 3960 11.3 8.29 491 396 588 446 8120 651 0.979 21.6
300x200x8.0 32.5 20 9390 5040 11.2 8.19 626 504 757 574 10600 838 0.966 16.3
300x200x10.0 25 15 11300 6060 11.1 8.09 754 606 921 698 13000 1010 0.957 13.2
300x200x12.0 20 11.7 12800 6850 10.9 7.96 853 685 1060 801 15200 1170 0.938 11.1
300x200x12.5 19 11 13200 7060 10.8 7.94 879 706 1090 828 15800 1200 0.936 10.6
400x200x8.0 45 20 19000 6520 14.4 8.45 949 652 1170 728 15800 1130 1.17 16.3
400x200x10.0 35 15 23000 7860 14.3 8.36 1150 786 1430 888 19400 1370 1.16 13.1
400x200x12.0 28.3 11.7 26200 8980 14.1 8.24 1310 898 1660 1030 22800 1590 1.14 11
400x200x12.5 27 11 27100 9260 14.1 8.22 1360 926 1710 1060 23600 1640 1.14 10.6
450x250x8.0 51.3 26.3 29300 11900 16.5 10.5 1300 953 1590 1060 27200 1630 1.37 16.2
450x250x10.0 40 20 35700 14500 16.4 10.4 1590 1160 1950 1300 33500 1980 1.36 13
450x250x12.0 32.5 15.8 41100 16700 16.2 10.3 1830 1330 2260 1520 39600 2310 1.34 10.9
450x250x12.5 31 15 42500 17200 16.2 10.3 1890 1380 2350 1570 41100 2390 1.34 10.5
500x300x8.0 57.5 32.5 42800 19600 18.6 12.6 1710 1310 2060 1460 42800 2200 1.57 16.2
500x300x10.0 45 25 52300 23900 18.5 12.5 2090 1600 2540 1790 52700 2690 1.56 13
500x300x12.0 36.7 20 60600 27700 18.3 12.4 2420 1850 2960 2090 62600 3160 1.54 10.9
500x300x12.5 35 19 62700 28700 18.3 12.4 2510 1910 3070 2170 65000 3270 1.54 10.5