Square Hollow Sections SHS
AS/NZS 1163Cold-formed square tubes, used for columns, posts, trusses, frames and balustrades. Dimensions, section properties, AS 4100 capacities and free DXF drawings for all 89 sizes.
Square hollow sections (SHS) are cold-formed to AS/NZS 1163, usually Grade C450L0 for common sizes (C350L0 for larger and thicker sections). They have equal properties about both axes and high torsional stiffness, with no lateral-torsional buckling, so they are popular for columns, posts, trusses, frames, balustrades and gates.
Section properties use an external corner radius of 2.0t for t ≤ 3 mm and 2.5t for thicker walls, consistent with Australian manufacturer practice.
Select any section in the table to open its page, with a dimensioned drawing, all section properties, AS 4100 capacities and a free DXF download for your CAD software.
Click a column heading to sort. Grade C450L0 capacities.
| Designation | Mass kg/m | d mm | b mm | t mm | Ag mm² | Ix 10⁶mm⁴ | Zx 10³mm³ | Sx 10³mm³ | Iy 10⁶mm⁴ | ry mm | J 10³mm⁴ | φMsx kNm | φNs kN |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 400x400x16.0SHS | 186.0 | 400 | 400 | 16.0 | 23697 | 571 | 2853 | 3367 | 571 | 155.2 | 930429 | 1345.7 | 9597 |
| 400x400x12.5SHS | 148.0 | 400 | 400 | 12.5 | 18838 | 464 | 2321 | 2710 | 464 | 157.0 | 743678 | 934.3 | 7582 |
| 400x400x10.0SHS | 120.0 | 400 | 400 | 10.0 | 15257 | 382 | 1911 | 2214 | 382 | 158.3 | 604313 | 607.2 | 4853 |
| 350x350x16.0SHS | 161.0 | 350 | 350 | 16.0 | 20497 | 372 | 2126 | 2527 | 372 | 134.7 | 613711 | 1023.5 | 8301 |
| 350x350x12.5SHS | 128.0 | 350 | 350 | 12.5 | 16338 | 305 | 1741 | 2044 | 305 | 136.6 | 492508 | 767.8 | 6617 |
| 350x350x10.0SHS | 104.0 | 350 | 350 | 10.0 | 13257 | 252 | 1439 | 1675 | 252 | 137.8 | 401270 | 526.7 | 4853 |
| 350x350x8.0SHS | 84.2 | 350 | 350 | 8.0 | 10724 | 207 | 1182 | 1366 | 207 | 138.9 | 325574 | 341.8 | 3106 |
| 300x300x16.0SHS | 136.0 | 300 | 300 | 16.0 | 17297 | 226 | 1506 | 1808 | 226 | 114.3 | 378253 | 732.1 | 7005 |
| 300x300x12.5SHS | 109.0 | 300 | 300 | 12.5 | 13838 | 187 | 1244 | 1471 | 187 | 116.1 | 305290 | 595.8 | 5605 |
| 300x300x10.0SHS | 88.4 | 300 | 300 | 10.0 | 11257 | 155 | 1035 | 1211 | 155 | 117.4 | 249657 | 436.4 | 4559 |
| 300x300x8.0SHS | 71.6 | 300 | 300 | 8.0 | 9124 | 128 | 853 | 991 | 128 | 118.4 | 203118 | 290.3 | 3106 |
| 250x250x16.0SHS | 111.0 | 250 | 250 | 16.0 | 14097 | 124 | 992 | 1208 | 124 | 93.8 | 212056 | 489.2 | 5709 |
| 250x250x12.5SHS | 89.0 | 250 | 250 | 12.5 | 11338 | 104 | 830 | 992 | 104 | 95.7 | 172650 | 401.9 | 4592 |
| 250x250x10.0SHS | 72.7 | 250 | 250 | 10.0 | 9257 | 87.1 | 697 | 822 | 87.1 | 97.0 | 141972 | 328.5 | 3749 |
| 250x250x9.0SHS | 65.9 | 250 | 250 | 9.0 | 8398 | 79.8 | 639 | 750 | 79.8 | 97.5 | 129133 | 283.1 | 3401 |
| 250x250x8.0SHS | 59.1 | 250 | 250 | 8.0 | 7524 | 72.3 | 578 | 676 | 72.3 | 98.0 | 115978 | 237.2 | 3047 |
| 250x250x6.0SHS | 45.0 | 250 | 250 | 6.0 | 5732 | 56.2 | 450 | 521 | 56.2 | 99.0 | 88740 | 136.9 | 1747 |
| 200x200x16.0SHS | 85.5 | 200 | 200 | 16.0 | 10897 | 58.5 | 585 | 728 | 58.5 | 73.3 | 103122 | 295.0 | 4413 |
| 200x200x12.5SHS | 69.4 | 200 | 200 | 12.5 | 8838 | 50.0 | 500 | 607 | 50.0 | 75.2 | 85212 | 246.0 | 3580 |
| 200x200x10.0SHS | 57.0 | 200 | 200 | 10.0 | 7257 | 42.5 | 425 | 508 | 42.5 | 76.5 | 70717 | 205.8 | 2939 |
| 200x200x9.0SHS | 51.8 | 200 | 200 | 9.0 | 6598 | 39.2 | 392 | 465 | 39.2 | 77.1 | 64540 | 188.5 | 2672 |
| 200x200x8.0SHS | 46.5 | 200 | 200 | 8.0 | 5924 | 35.7 | 357 | 421 | 35.7 | 77.6 | 58152 | 168.2 | 2399 |
| 200x200x6.0SHS | 35.6 | 200 | 200 | 6.0 | 4532 | 28.0 | 280 | 327 | 28.0 | 78.6 | 44762 | 108.0 | 1747 |
| 200x200x5.0SHS | 29.9 | 200 | 200 | 5.0 | 3814 | 23.9 | 239 | 277 | 23.9 | 79.1 | 37770 | 75.9 | 1213 |
| 150x150x10.0SHS | 41.3 | 150 | 150 | 10.0 | 5257 | 16.5 | 220 | 269 | 16.5 | 56.1 | 28392 | 109.0 | 2129 |
| 150x150x9.0SHS | 37.7 | 150 | 150 | 9.0 | 4798 | 15.4 | 205 | 248 | 15.4 | 56.6 | 26079 | 100.5 | 1943 |
| 150x150x8.0SHS | 33.9 | 150 | 150 | 8.0 | 4324 | 14.1 | 188 | 226 | 14.1 | 57.1 | 23641 | 91.5 | 1751 |
| 150x150x6.0SHS | 26.2 | 150 | 150 | 6.0 | 3332 | 11.3 | 150 | 178 | 11.3 | 58.2 | 18400 | 71.0 | 1350 |
| 150x150x5.0SHS | 22.1 | 150 | 150 | 5.0 | 2814 | 9.70 | 129 | 151 | 9.70 | 58.7 | 15604 | 54.5 | 1140 |
| 125x125x10.0SHS | 33.4 | 125 | 125 | 10.0 | 4257 | 8.93 | 143 | 178 | 8.93 | 45.8 | 15735 | 72.0 | 1724 |
| 125x125x9.0SHS | 30.6 | 125 | 125 | 9.0 | 3898 | 8.38 | 134 | 165 | 8.38 | 46.4 | 14540 | 66.8 | 1579 |
| 125x125x8.0SHS | 27.7 | 125 | 125 | 8.0 | 3524 | 7.75 | 124 | 151 | 7.75 | 46.9 | 13254 | 61.2 | 1427 |
| 125x125x6.0SHS | 21.4 | 125 | 125 | 6.0 | 2732 | 6.29 | 101 | 120 | 6.29 | 48.0 | 10417 | 48.6 | 1107 |
| 125x125x5.0SHS | 18.2 | 125 | 125 | 5.0 | 2314 | 5.44 | 87.1 | 103 | 5.44 | 48.5 | 8873 | 41.1 | 937 |
| 125x125x4.0SHS | 14.8 | 125 | 125 | 4.0 | 1881 | 4.52 | 72.3 | 84.5 | 4.52 | 49.0 | 7249 | 29.7 | 762 |
| 100x100x10.0SHS | 25.6 | 100 | 100 | 10.0 | 3257 | 4.11 | 82.2 | 105 | 4.11 | 35.5 | 7498 | 42.6 | 1319 |
| 100x100x9.0SHS | 23.5 | 100 | 100 | 9.0 | 2998 | 3.91 | 78.1 | 98.6 | 3.91 | 36.1 | 7003 | 39.9 | 1214 |
| 100x100x8.0SHS | 21.4 | 100 | 100 | 8.0 | 2724 | 3.66 | 73.2 | 91.0 | 3.66 | 36.7 | 6445 | 36.9 | 1103 |
| 100x100x6.0SHS | 16.7 | 100 | 100 | 6.0 | 2132 | 3.04 | 60.7 | 73.5 | 3.04 | 37.7 | 5151 | 29.8 | 864 |
| 100x100x5.0SHS | 14.2 | 100 | 100 | 5.0 | 1814 | 2.66 | 53.1 | 63.5 | 2.66 | 38.3 | 4420 | 25.7 | 735 |
| 100x100x4.0SHS | 11.6 | 100 | 100 | 4.0 | 1481 | 2.23 | 44.6 | 52.6 | 2.23 | 38.8 | 3634 | 21.0 | 600 |
| 100x100x3.0SHS | 8.96 | 100 | 100 | 3.0 | 1141 | 1.77 | 35.4 | 41.2 | 1.77 | 39.4 | 2787 | 13.6 | 440 |
| 100x100x2.5SHS | 7.53 | 100 | 100 | 2.5 | 959 | 1.51 | 30.1 | 34.9 | 1.51 | 39.6 | 2352 | 9.6 | 305 |
| 90x90x2.5SHS | 6.74 | 90 | 90 | 2.5 | 859 | 1.09 | 24.1 | 28.0 | 1.09 | 35.6 | 1703 | 8.6 | 305 |
| 90x90x2.0SHS | 5.45 | 90 | 90 | 2.0 | 694 | 0.889 | 19.7 | 22.8 | 0.889 | 35.8 | 1381 | 5.5 | 196 |
| 89x89x6.0SHS | 14.7 | 89 | 89 | 6.0 | 1868 | 2.06 | 46.4 | 56.7 | 2.06 | 33.2 | 3550 | 23.0 | 757 |
| 89x89x5.0SHS | 12.5 | 89 | 89 | 5.0 | 1594 | 1.82 | 40.8 | 49.2 | 1.82 | 33.8 | 3061 | 19.9 | 646 |
| 89x89x3.5SHS | 9.07 | 89 | 89 | 3.5 | 1155 | 1.38 | 31.0 | 36.5 | 1.38 | 34.6 | 2246 | 14.5 | 468 |
| 89x89x2.0SHS | 5.38 | 89 | 89 | 2.0 | 686 | 0.858 | 19.3 | 22.3 | 0.858 | 35.4 | 1335 | 5.5 | 196 |
| 75x75x6.0SHS | 12.0 | 75 | 75 | 6.0 | 1532 | 1.16 | 30.9 | 38.4 | 1.16 | 27.5 | 2039 | 15.6 | 621 |
| 75x75x5.0SHS | 10.3 | 75 | 75 | 5.0 | 1314 | 1.03 | 27.5 | 33.6 | 1.03 | 28.0 | 1775 | 13.6 | 532 |
| 75x75x4.0SHS | 8.49 | 75 | 75 | 4.0 | 1081 | 0.882 | 23.5 | 28.2 | 0.882 | 28.6 | 1478 | 11.4 | 438 |
| 75x75x3.5SHS | 7.53 | 75 | 75 | 3.5 | 959 | 0.797 | 21.3 | 25.3 | 0.797 | 28.8 | 1317 | 10.2 | 388 |
| 75x75x3.0SHS | 6.60 | 75 | 75 | 3.0 | 841 | 0.716 | 19.1 | 22.5 | 0.716 | 29.2 | 1145 | 9.0 | 341 |
| 75x75x2.5SHS | 5.56 | 75 | 75 | 2.5 | 709 | 0.614 | 16.4 | 19.1 | 0.614 | 29.4 | 971 | 6.9 | 287 |
| 75x75x2.0SHS | 4.50 | 75 | 75 | 2.0 | 574 | 0.505 | 13.5 | 15.6 | 0.505 | 29.7 | 790 | 4.6 | 196 |
| 65x65x6.0SHS | 10.1 | 65 | 65 | 6.0 | 1292 | 0.706 | 21.7 | 27.5 | 0.706 | 23.4 | 1271 | 11.1 | 523 |
| 65x65x5.0SHS | 8.75 | 65 | 65 | 5.0 | 1114 | 0.638 | 19.6 | 24.3 | 0.638 | 23.9 | 1118 | 9.9 | 451 |
| 65x65x4.0SHS | 7.23 | 65 | 65 | 4.0 | 921 | 0.552 | 17.0 | 20.6 | 0.552 | 24.5 | 939 | 8.3 | 373 |
| 65x65x3.0SHS | 5.66 | 65 | 65 | 3.0 | 721 | 0.454 | 14.0 | 16.6 | 0.454 | 25.1 | 733 | 6.7 | 292 |
| 65x65x2.5SHS | 4.78 | 65 | 65 | 2.5 | 609 | 0.391 | 12.0 | 14.1 | 0.391 | 25.3 | 624 | 5.5 | 247 |
| 65x65x2.0SHS | 3.88 | 65 | 65 | 2.0 | 494 | 0.323 | 9.94 | 11.6 | 0.323 | 25.6 | 509 | 3.9 | 196 |
| 65x65x1.6SHS | 3.13 | 65 | 65 | 1.6 | 399 | 0.265 | 8.16 | 9.44 | 0.265 | 25.8 | 414 | 2.6 | 125 |
| 50x50x6.0SHS | 7.32 | 50 | 50 | 6.0 | 932 | 0.275 | 11.0 | 14.5 | 0.275 | 17.2 | 518 | 5.9 | 378 |
| 50x50x5.0SHS | 6.39 | 50 | 50 | 5.0 | 814 | 0.257 | 10.3 | 13.2 | 0.257 | 17.8 | 469 | 5.3 | 330 |
| 50x50x4.0SHS | 5.35 | 50 | 50 | 4.0 | 681 | 0.229 | 9.15 | 11.4 | 0.229 | 18.3 | 403 | 4.6 | 276 |
| 50x50x3.0SHS | 4.25 | 50 | 50 | 3.0 | 541 | 0.195 | 7.79 | 9.39 | 0.195 | 19.0 | 321 | 3.8 | 219 |
| 50x50x2.5SHS | 3.60 | 50 | 50 | 2.5 | 459 | 0.169 | 6.78 | 8.07 | 0.169 | 19.2 | 275 | 3.3 | 186 |
| 50x50x2.0SHS | 2.93 | 50 | 50 | 2.0 | 374 | 0.141 | 5.66 | 6.66 | 0.141 | 19.5 | 226 | 2.7 | 151 |
| 50x50x1.6SHS | 2.38 | 50 | 50 | 1.6 | 303 | 0.117 | 4.68 | 5.46 | 0.117 | 19.6 | 185 | 1.9 | 123 |
| 40x40x4.0SHS | 4.09 | 40 | 40 | 4.0 | 521 | 0.105 | 5.26 | 6.74 | 0.105 | 14.2 | 192 | 2.7 | 211 |
| 40x40x3.0SHS | 3.30 | 40 | 40 | 3.0 | 421 | 0.0932 | 4.66 | 5.72 | 0.0932 | 14.9 | 158 | 2.3 | 170 |
| 40x40x2.5SHS | 2.82 | 40 | 40 | 2.5 | 359 | 0.0821 | 4.11 | 4.97 | 0.0821 | 15.1 | 136 | 2.0 | 145 |
| 40x40x2.0SHS | 2.31 | 40 | 40 | 2.0 | 294 | 0.0694 | 3.47 | 4.13 | 0.0694 | 15.4 | 113 | 1.7 | 119 |
| 40x40x1.6SHS | 1.88 | 40 | 40 | 1.6 | 239 | 0.0579 | 2.90 | 3.41 | 0.0579 | 15.6 | 92.7 | 1.4 | 97 |
| 35x35x3.0SHS | 2.83 | 35 | 35 | 3.0 | 361 | 0.0595 | 3.40 | 4.23 | 0.0595 | 12.8 | 102 | 1.7 | 146 |
| 35x35x2.5SHS | 2.42 | 35 | 35 | 2.5 | 309 | 0.0529 | 3.02 | 3.69 | 0.0529 | 13.1 | 88.9 | 1.5 | 125 |
| 35x35x2.0SHS | 1.99 | 35 | 35 | 2.0 | 254 | 0.0451 | 2.58 | 3.09 | 0.0451 | 13.3 | 74.1 | 1.3 | 103 |
| 35x35x1.6SHS | 1.63 | 35 | 35 | 1.6 | 207 | 0.0379 | 2.16 | 2.57 | 0.0379 | 13.5 | 61.1 | 1.0 | 84 |
| 30x30x3.0SHS | 2.36 | 30 | 30 | 3.0 | 301 | 0.0350 | 2.34 | 2.96 | 0.0350 | 10.8 | 61.5 | 1.2 | 122 |
| 30x30x2.5SHS | 2.03 | 30 | 30 | 2.5 | 259 | 0.0316 | 2.10 | 2.61 | 0.0316 | 11.0 | 54.0 | 1.1 | 105 |
| 30x30x2.0SHS | 1.68 | 30 | 30 | 2.0 | 214 | 0.0272 | 1.81 | 2.21 | 0.0272 | 11.3 | 45.4 | 0.9 | 87 |
| 30x30x1.6SHS | 1.38 | 30 | 30 | 1.6 | 175 | 0.0231 | 1.54 | 1.84 | 0.0231 | 11.5 | 37.7 | 0.7 | 71 |
| 25x25x3.0SHS | 1.89 | 25 | 25 | 3.0 | 241 | 0.0184 | 1.47 | 1.91 | 0.0184 | 8.7 | 33.3 | 0.8 | 98 |
| 25x25x2.5SHS | 1.64 | 25 | 25 | 2.5 | 209 | 0.0169 | 1.35 | 1.71 | 0.0169 | 9.0 | 29.7 | 0.7 | 85 |
| 25x25x2.0SHS | 1.36 | 25 | 25 | 2.0 | 174 | 0.0148 | 1.19 | 1.47 | 0.0148 | 9.2 | 25.3 | 0.6 | 70 |
| 25x25x1.6SHS | 1.12 | 25 | 25 | 1.6 | 143 | 0.0128 | 1.02 | 1.24 | 0.0128 | 9.4 | 21.2 | 0.5 | 58 |
| 20x20x2.0SHS | 1.05 | 20 | 20 | 2.0 | 134 | 0.00692 | 0.692 | 0.877 | 0.00692 | 7.2 | 12.1 | 0.4 | 54 |
| 20x20x1.6SHS | 0.87 | 20 | 20 | 1.6 | 111 | 0.00608 | 0.608 | 0.751 | 0.00608 | 7.4 | 10.3 | 0.3 | 45 |
Frequently asked questions
- C350L0 or C450L0?
- Most common SHS and RHS are made in C450L0 (450 MPa yield). Larger and thicker sections are C350L0. 'L0' means impact tested at 0 °C.
- Do SHS need lateral restraint?
- Generally no. A closed square section has equal stiffness about both axes and a very high torsion constant, so lateral-torsional buckling does not govern. Restraint may still be needed at supports for stability during erection.
Relevant Australian Standards
- AS/NZS 1163:2016 Cold-formed structural steel hollow sections
Covers cold-formed CHS, RHS and SHS in Grades C250L0, C350L0 and C450L0, including the corner-radius and thickness tolerances used to calculate section properties. - AS 4100:2020 Steel structures
The Australian design Standard for steel members and connections. Covers section classification (Section 5), member moment capacity including lateral-torsional buckling (5.6), shear (5.11), axial compression (Section 6), tension (Section 7) and combined actions (Section 8). - AS/NZS 1554.1:2014 Structural steel welding – Welding of steel structures
Weld procedures, welder qualification, weld categories (SP and GP) and inspection requirements for structural welds. - AS/NZS 2312.1:2014 & 2312.2:2014 Guide to the protection of structural steel against atmospheric corrosion
Part 1 covers protective paint coatings and Part 2 hot-dip galvanizing; both use the external surface areas given on each section page.