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