Dimensions - Asymmetric Beams

Welcome to our Asymmetric Beam dimensions page! Here you'll find dimensions for all UK Asymmetric Beam 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 Mass per Metre Depth of Section Width of Flange Thickness Root Radius Depth between Fillets Ratios for Local Buckling Second Moment of Area Surface Area
      Top Bottom Web Flange   Flanges Web Axis
x-x
Axis
y-y
Per Metre Per Tonne
  kg/m D
mm
Bt
mm
Bb
mm
t
mm
T
mm
r
mm
d
mm
bt/T bb/T d/t cm4 cm4 m2 m2
300ASB249 249 342 203 313 40 40 27 208 2.54 3.91 5.2 52900 13200 1.59 6.38
300ASB196 196 342 183 293 20 40 27 208 2.29 3.66 10.4 45900 10500 1.55 7.93
300ASB185 185 320 195 305 32 29 27 208 3.36 5.26 6.5 35700 8750 1.53 8.29
300ASB155 155 326 179 289 16 32 27 208 2.8 4.52 13 34500 7990 1.51 9.71
300ASB153 153 310 190 300 27 24 27 208 3.96 6.25 7.7 28400 6840 1.5 9.81
280ASB136 136 288 190 300 25 22 24 196 4.32 6.82 7.84 22200 6260 1.46 10.7
280ASB124 124 296 178 288 13 26 24 196 3.42 5.54 15.1 23500 6410 1.46 11.8
280ASB105 105 288 176 286 11 22 24 196 4 6.5 17.8 19200 5300 1.44 13.7
280ASB100 100 276 184 294 19 16 24 196 5.75 9.19 10.3 15500 4250 1.43 14.2
280ASB74 73.6 272 175 285 10 14 24 196 6.25 10.2 19.6 12200 3330 1.4 19.1