Dimensions - Cold-Formed Square Hollow Sections
Welcome to our Cold-Formed Square Hollow Section dimensions page! Here you'll find dimensions for all UK Cold-Formed Square 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 shapes as individual files or AutoCAD Design Center files! Click here to visit our Shop.
| Section Reference | Size | Thickness | Mass per Metre | Area of Section |
|---|---|---|---|---|
| D x D mm | t mm | kg/m | A cm2 | |
| 25x25x2.0 | 25x25 | 2 | 1.36 | 1.74 |
| 25x25x2.5 | 25x25 | 2.5 | 1.64 | 2.09 |
| 25x25x3.0 | 25x25 | 3 | 1.89 | 2.41 |
| 30x30x2.5 | 30x30 | 2.5 | 2.03 | 2.59 |
| 30x30x3.0 | 30x30 | 3 | 2.36 | 3.01 |
| 40x40x2.0 | 40x40 | 2 | 2.31 | 2.94 |
| 40x40x2.5 | 40x40 | 2.5 | 2.82 | 3.59 |
| 40x40x3.0 | 40x40 | 3 | 3.3 | 4.21 |
| 40x40x4.0 | 40x40 | 4 | 4.2 | 5.35 |
| 50x50x2.5 | 50x50 | 2.5 | 3.6 | 4.59 |
| 50x50x3.0 | 50x50 | 3 | 4.25 | 5.41 |
| 50x50x4.0 | 50x50 | 4 | 5.45 | 6.95 |
| 50x50x5.0 | 50x50 | 5 | 6.56 | 8.36 |
| 60x60x3.0 | 60x60 | 3 | 5.19 | 6.61 |
| 60x60x4.0 | 60x60 | 4 | 6.71 | 8.55 |
| 60x60x5.0 | 60x60 | 5 | 8.13 | 10.4 |
| 70x70x2.5 | 70x70 | 2.5 | 5.17 | 6.59 |
| 70x70x3.0 | 70x70 | 3 | 6.13 | 7.81 |
| 70x70x3.5 | 70x70 | 3.5 | 7.06 | 8.99 |
| 70x70x4.0 | 70x70 | 4 | 7.97 | 10.1 |
| 70x70x5.0 | 70x70 | 5 | 9.7 | 12.4 |
| 80x80x3.0 | 80x80 | 3 | 7.07 | 9.01 |
| 80x80x3.5 | 80x80 | 3.5 | 8.16 | 10.4 |
| 80x80x4.0 | 80x80 | 4 | 9.22 | 11.7 |
| 80x80x5.0 | 80x80 | 5 | 11.3 | 14.4 |
| 80x80x6.0 | 80x80 | 6 | 13.2 | 16.8 |
| 90x90x3.0 | 90x90 | 3 | 8.01 | 10.2 |
| 90x90x3.5 | 90x90 | 3.5 | 9.26 | 11.8 |
| 90x90x4.0 | 90x90 | 4 | 10.5 | 13.3 |
| 90x90x5.0 | 90x90 | 5 | 12.8 | 16.4 |
| 90x90x6.0 | 90x90 | 6 | 15.1 | 19.2 |
| 100x100x3.0 | 100x100 | 3 | 8.96 | 11.4 |
| 100x100x4.0 | 100x100 | 4 | 11.7 | 14.9 |
| 100x100x5.0 | 100x100 | 5 | 14.4 | 18.4 |
| 100x100x6.0 | 100x100 | 6 | 17 | 21.6 |
| 100x100x8.0 | 100x100 | 8 | 21.4 | 27.2 |
| 120x120x4.0 | 120x120 | 4 | 14.2 | 18.1 |
| 120x120x5.0 | 120x120 | 5 | 17.5 | 22.4 |
| 120x120x6.0 | 120x120 | 6 | 20.7 | 26.4 |
| 120x120x8.0 | 120x120 | 8 | 26.4 | 33.6 |
| 120x120x10.0 | 120x120 | 10 | 31.8 | 40.6 |
| 140x140x4.0 | 140x140 | 4 | 16.8 | 21.3 |
| 140x140x5.0 | 140x140 | 5 | 20.7 | 26.4 |
| 140x140x6.0 | 140x140 | 6 | 24.5 | 31.2 |
| 140x140x8.0 | 140x140 | 8 | 31.4 | 40 |
| 140x140x10.0 | 140x140 | 10 | 38.1 | 48.6 |
| 150x150x4.0 | 150x150 | 4 | 18 | 22.9 |
| 150x150x5.0 | 150x150 | 5 | 22.3 | 28.4 |
| 150x150x6.0 | 150x150 | 6 | 26.4 | 33.6 |
| 150x150x8.0 | 150x150 | 8 | 33.9 | 43.2 |
| 150x150x10.0 | 150x150 | 10 | 41.3 | 52.6 |
| 160x160x4.0 | 160x160 | 4 | 19.3 | 24.5 |
| 160x160x5.0 | 160x160 | 5 | 23.8 | 30.4 |
| 160x160x6.0 | 160x160 | 6 | 28.3 | 36 |
| 160x160x8.0 | 160x160 | 8 | 36.5 | 46.4 |
| 160x160x10.0 | 160x160 | 10 | 44.4 | 56.6 |
| 180x180x5.0 | 180x180 | 5 | 27 | 34.4 |
| 180x180x6.0 | 180x180 | 6 | 32.1 | 40.8 |
| 180x180x8.0 | 180x180 | 8 | 41.5 | 52.8 |
| 180x180x10.0 | 180x180 | 10 | 50.7 | 64.6 |
| 180x180x12.0 | 180x180 | 12 | 58.5 | 74.5 |
| 180x180x12.5 | 180x180 | 12.5 | 60.5 | 77 |
| 200x200x5.0 | 200x200 | 5 | 30.1 | 38.4 |
| 200x200x6.0 | 200x200 | 6 | 35.8 | 45.6 |
| 200x200x8.0 | 200x200 | 8 | 46.5 | 59.2 |
| 200x200x10.0 | 200x200 | 10 | 57 | 72.6 |
| 200x200x12.0 | 200x200 | 12 | 66 | 84.1 |
| 200x200x12.5 | 200x200 | 12.5 | 68.3 | 87 |
| 250x250x6.0 | 250x250 | 6 | 45.2 | 57.6 |
| 250x250x8.0 | 250x250 | 8 | 59.1 | 75.2 |
| 250x250x10.0 | 250x250 | 10 | 72.7 | 92.6 |
| 250x250x12.0 | 250x250 | 12 | 84.8 | 108 |
| 250x250x12.5 | 250x250 | 12.5 | 88 | 112 |
| 300x300x6.0 | 300x300 | 6 | 54.7 | 69.6 |
| 300x300x8.0 | 300x300 | 8 | 71.6 | 91.2 |
| 300x300x10.0 | 300x300 | 10 | 88.4 | 113 |
| 300x300x12.0 | 300x300 | 12 | 104 | 132 |
| 300x300x12.5 | 300x300 | 12.5 | 108 | 137 |
| 350x350x8.0 | 350x350 | 8 | 84.2 | 107 |
| 350x350x10.0 | 350x350 | 10 | 104 | 133 |
| 350x350x12.0 | 350x350 | 12 | 123 | 156 |
| 350x350x12.5 | 350x350 | 12.5 | 127 | 162 |
| 400x400x8.0 | 400x400 | 8 | 96.7 | 123 |
| 400x400x10.0 | 400x400 | 10 | 120 | 153 |
| 400x400x12.0 | 400x400 | 12 | 141 | 180 |
| 400x400x12.5 | 400x400 | 12.5 | 147 | 187 |