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 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 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