Properties - Hot Finished Circular Hollow Sections

Welcome to our Hot Finished Circular Hollow Section properties page! Here you'll find properties for all UK Hot Finished Circular 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 Ratio for Local Buckling Second Moment of Area Radius of Gyration Elastic Modulus Plastic Modulus Torsional Constants Surface Area
                Per Metre Per Tonne
  D/t I
cm4
r
cm
Z
cm3
S
cm3
J
cm4
C
cm3
m2 m2
26.9x3.2 8.41 1.7 0.846 1.27 1.81 3.41 2.53 0.085 45.2
33.7x2.6 13 3.09 1.1 1.84 2.52 6.19 3.67 0.106 53.1
33.7x3.2 10.5 3.6 1.08 2.14 2.99 7.21 4.28 0.106 44
33.7x4.0 8.43 4.19 1.06 2.49 3.55 8.38 4.97 0.106 36.1
42.4x2.6 16.3 6.46 1.41 3.05 4.12 12.9 6.1 0.133 52.2
42.4x3.2 13.3 7.62 1.39 3.59 4.93 15.2 7.19 0.133 43.1
42.4x4.0 10.6 8.99 1.36 4.24 5.92 18 8.48 0.133 35.2
42.4x5.0 8.48 10.5 1.33 4.93 7.04 20.9 9.86 0.133 28.9
48.3x3.2 15.1 11.6 1.6 4.8 6.52 23.2 9.59 0.152 42.6
48.3x4.0 12.1 13.8 1.57 5.7 7.87 27.5 11.4 0.152 34.7
48.3x5.0 9.66 16.2 1.54 6.69 9.42 32.3 13.4 0.152 28.4
60.3x3.2 18.8 23.5 2.02 7.78 10.4 46.9 15.6 0.189 42
60.3x4.0 15.1 28.2 2 9.34 12.7 56.3 18.7 0.189 34.1
60.3x5.0 12.1 33.5 1.96 11.1 15.3 67 22.2 0.189 27.8
76.1x2.9 26.2 44.7 2.59 11.8 15.5 89.5 23.5 0.239 45.7
76.1x3.2 23.8 48.8 2.58 12.8 17 97.6 25.6 0.239 41.6
76.1x4.0 19 59.1 2.55 15.5 20.8 118 31 0.239 33.6
76.1x5.0 15.2 70.9 2.52 18.6 25.3 142 37.3 0.239 27.3
88.9x3.2 27.8 79.2 3.03 17.8 23.5 158 35.6 0.279 41.3
88.9x4.0 22.2 96.3 3 21.7 28.9 193 43.3 0.279 33.3
88.9x5.0 17.8 116 2.97 26.2 35.2 233 52.4 0.279 27
88.9x6.3 14.1 140 2.93 31.5 43.1 280 63.1 0.279 21.8
114.3x3.2 35.7 172 3.93 30.2 39.5 345 60.4 0.359 41
114.3x3.6 31.8 192 3.92 33.6 44.1 384 67.2 0.359 36.5
114.3x4.0 28.6 211 3.9 36.9 48.7 422 73.9 0.359 33
114.3x5.0 22.9 257 3.87 45 59.8 514 89.9 0.359 26.6
114.3x6.3 18.1 313 3.82 54.7 73.6 625 109 0.359 21.4
139.7x5.0 27.9 481 4.77 68.8 90.8 961 138 0.439 26.4
139.7x6.3 22.2 589 4.72 84.3 112 1177 169 0.439 21.2
139.7x8.0 17.5 720 4.66 103 139 1441 206 0.439 16.9
139.7x10.0 14 862 4.6 123 169 1724 247 0.439 13.7
168.3x5.0 33.7 856 5.78 102 133 1710 203 0.529 26.3
168.3x6.3 26.7 1050 5.73 125 165 2110 250 0.529 21
168.3x8.0 21 1300 5.67 154 206 2600 308 0.529 16.7
168.3x10.0 16.8 1560 5.61 186 251 3130 372 0.529 13.5
168.3x12.5 13.5 1870 5.53 222 304 3740 444 0.529 11
193.7x5.0 38.7 1320 6.67 136 178 2640 273 0.609 26.2
193.7x6.3 30.7 1630 6.63 168 221 3260 337 0.609 20.9
193.7x8.0 24.2 2020 6.57 208 276 4030 416 0.609 16.6
193.7x10.0 19.4 2440 6.5 252 338 4880 504 0.609 13.4
193.7x12.5 15.5 2930 6.42 303 411 5870 606 0.609 10.9
219.1x5.0 43.8 1930 7.57 176 229 3860 352 0.688 26.1
219.1x6.3 34.8 2390 7.53 218 285 4770 436 0.688 20.8
219.1x8.0 27.4 2960 7.47 270 357 5920 540 0.688 16.5
219.1x10.0 21.9 3600 7.4 328 438 7200 657 0.688 13.3
219.1x12.5 17.5 4350 7.32 397 534 8690 793 0.688 10.8
219.1x14.2 15.4 4820 7.26 440 597 9640 880 0.688 9.59
219.1x16.0 13.7 5300 7.2 483 661 10600 967 0.688 8.59
244.5x8.0 30.6 4160 8.37 340 448 8320 681 0.768 16.5
244.5x10.0 24.5 5070 8.3 415 550 10100 830 0.768 13.3
244.5x12.5 19.6 6150 8.21 503 673 12300 1010 0.768 10.7
244.5x14.2 17.2 6840 8.16 559 754 13700 1120 0.768 9.52
244.5x16.0 15.3 7530 8.1 616 837 15100 1230 0.768 8.52
273.0x6.3 43.3 4700 9.43 344 448 9390 688 0.858 20.7
273.0x8.0 34.1 5850 9.37 429 562 11700 857 0.858 16.4
273.0x10.0 27.3 7150 9.31 524 692 14300 1050 0.858 13.2
273.0x12.5 21.8 8700 9.22 637 849 17400 1270 0.858 10.7
273.0x14.2 19.2 9700 9.16 710 952 19400 1420 0.858 9.46
273.0x16.0 17.1 10700 9.1 784 1060 21400 1570 0.858 8.46
323.9x6.3 51.4 7930 11.2 490 636 15900 979 1.02 20.6
323.9x8.0 40.5 9910 11.2 612 799 19800 1220 1.02 16.3
323.9x10.0 32.4 12200 11.1 751 986 24300 1500 1.02 13.1
323.9x12.5 25.9 14800 11 917 1210 29700 1830 1.02 10.6
323.9x14.2 22.8 16600 11 1030 1360 33200 2050 1.02 9.38
323.9x16.0 20.2 18400 10.9 1140 1520 36800 2270 1.02 8.38
355.6x14.2 25 22200 12.1 1250 1660 44500 2500 1.12 9.34
355.6x16.0 22.2 24700 12 1390 1850 49300 2770 1.12 8.34
406.4x6.3 64.5 15800 14.1 780 1010 31700 1560 1.28 20.5
406.4x8.0 50.8 19900 14.1 978 1270 39700 1960 1.28 16.2
406.4x10.0 40.6 24500 14 1210 1570 49000 2410 1.28 13.1
406.4x12.5 32.5 30000 13.9 1480 1940 60100 2960 1.28 10.5
406.4x14.2 28.6 33700 13.9 1660 2190 67400 3320 1.28 9.3
406.4x16.0 25.4 37400 13.8 1840 2440 74900 3690 1.28 8.29
457.0x8.0 57.1 28400 15.9 1250 1610 56900 2490 1.44 16.2
457.0x10.0 45.7 35100 15.8 1540 2000 70200 3070 1.44 13
457.0x12.5 36.6 43100 15.7 1890 2470 86300 3780 1.44 10.5
457.0x14.2 32.2 48500 15.7 2120 2790 96900 4240 1.44 9.26
457.0x16.0 28.6 54000 15.6 2360 3110 108000 4720 1.44 8.25
508.0x10.0 50.8 48500 17.6 1910 2480 97000 3820 1.6 13
508.0x12.5 40.6 59800 17.5 2350 3070 120000 4710 1.6 10.4
508.0x14.2 35.8 67200 17.5 2650 3460 134000 5290 1.6 9.23
508.0x16.0 31.8 74900 17.4 2950 3870 150000 5900 1.6 8.22