Properties - Cold-Formed Rectangular Hollow Sections

Welcome to our Cold-Formed Rectangular Hollow Section properties page! Here you'll find properties for all UK Cold-Formed Rectangular 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.

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Section ReferenceRatios for Local BucklingSecond Moment of AreaRadius of GyrationElastic ModulusPlastic ModulusTorsional ConstantsSurface Area
   Axis
x-x
Axis
y-y
Axis
x-x
Axis
y-y
Axis
x-x
Axis
yy
Axis
x-x
Axis
y-y
  Per MetrePer Tonne
 d/t(1)b/t(1)cm4cm4cmcmcm3cm3cm3cm3J
cm4
C
cm3
m2m2
50x25x2.0207.58.382.811.751.013.352.254.262.627.063.920.14366.6
50x25x3.011.73.3311.23.671.690.9694.472.935.863.569.645.180.1445.5
50x30x2.515711.35.051.771.194.523.375.73.9811.75.720.15153.7
50x30x3.011.7512.85.71.751.165.133.86.574.5813.56.490.1545.3
50x30x4.07.52.515.36.691.691.126.14.468.055.5816.57.710.14634.8
60x30x3.015520.56.82.061.196.834.538.825.3917.57.950.1745
60x30x4.0102.524.78.0621.148.235.3710.96.6221.59.520.16634.5
60x40x3.0158.3325.413.42.171.588.466.7210.57.9429.311.20.1944.7
60x40x4.01053116.32.111.5310.38.1413.29.8936.713.70.18634.2
60x40x5.07335.318.42.061.4811.89.2115.411.542.815.60.18327.9
70x40x3.018.38.3337.315.52.491.6110.77.7513.49.0536.513.20.2144.5
70x40x4.012.554618.92.441.5613.19.4416.811.345.816.20.20633.9
70x50x3.018.311.744.126.12.581.9912.610.415.412.253.617.10.2344.3
70x50x4.012.57.554.732.22.531.9415.612.919.515.468.121.20.22633.7
80x40x3.021.78.3352.317.62.811.6313.18.7816.510.243.915.30.2344.3
80x40x4.015564.821.52.751.5916.210.720.912.855.218.80.22633.7
80x40x5.011375.124.62.691.5418.812.324.7156521.70.22327.4
80x50x3.021.711.761.129.42.912.0215.311.818.813.66519.70.2544.1
80x50x4.0157.576.436.52.861.9819.114.62417.282.724.60.24633.6
80x50x5.011589.242.32.81.9322.316.928.520.598.428.70.24327.2
80x60x3.021.7157044.932.417.51521.217.488.324.10.2744
80x60x4.0151087.956.12.942.352218.72722.111330.30.26633.4
80x60x5.011710365.72.892.3125.821.932.226.413635.70.26327.1
90x50x3.02511.781.932.73.242.0518.213.122.61576.722.40.2744
90x50x4.017.57.510340.73.18222.816.328.819.197.7280.26633.4
90x50x5.013512147.43.121.9626.818.934.422.711632.70.26327.1
100x40x3.028.38.3392.321.73.441.6718.510.823.712.45919.40.2744
100x40x4.020511626.73.381.6223.113.330.315.774.5240.26633.4
100x40x5.015313630.83.311.5827.115.436.118.587.927.90.26327.1
100x50x3.028.311.710636.13.562.0721.314.426.716.488.6250.2943.9
100x50x4.0207.513444.93.52.0326.81834.120.911331.30.28633.3
100x50x5.015515852.53.441.9831.62140.82513536.80.28327
100x50x6.011.73.3317958.73.381.9435.823.546.928.515441.40.27922.8
100x60x3.028.31512154.63.662.4624.118.229.620.812230.60.3143.8
100x60x3.523.612.113761.93.632.4427.420.633.823.813934.80.30837.7
100x60x4.0201015368.73.62.4230.522.937.926.615638.70.30633.2
100x60x5.015718180.83.552.3736.226.945.631.918845.80.30326.9
100x60x6.011.7520591.23.492.3341.130.452.536.621651.90.29922.7
100x80x3.028.321.71491063.823.2229.826.435.430.419641.90.3543.6
100x80x4.020151891343.773.1737.933.545.639.225453.40.34633
100x80x5.015112261603.723.1245.239.955.147.230863.70.34326.7
120x40x3.0358.3314825.84.051.6924.712.932.214.674.623.50.3143.8
120x40x4.025518731.93.991.6531.115.941.218.594.229.20.30633.2
120x40x5.019322136.93.921.636.818.549.42211134.10.30326.9
120x60x3.0351518964.44.32.5131.521.539.224.215637.10.3543.6
120x60x3.529.312.121673.14.282.4935.924.444.927.717942.20.34837.6
120x60x4.0251024181.24.252.4740.127.150.531.1201470.34633
120x60x5.0197287964.192.4247.83260.937.424255.80.34326.7
120x60x6.01553281094.132.3854.736.370.643.128063.60.33922.5
120x80x4.025152951574.443.2449.139.359.845.233164.90.38632.9
120x80x5.019113531884.393.258.946.972.454.740277.80.38326.6
120x80x6.0158.334062154.333.1567.753.884.363.546989.40.37922.3
120x80x8.01054762524.183.0479.362.910276.95841080.36617.1
140x80x3.041.721.73341415.153.3547.835.358.239.631759.70.4343.4
140x80x4.030154301805.13.361.445.175.551.341276.50.42632.8
140x80x5.023115172165.043.2673.95491.862.250191.80.42326.5
140x80x6.018.38.335972484.983.2185.36210772.45841060.41922.2
140x80x8.012.557082934.823.110173.313188.47311290.40617
140x80x10.0938043304.693.0111582.61521038511470.39713.8
150x100x3.04528.34612485.654.1561.449.573.555.850781.40.4943.3
150x100x4.032.5205953195.64.179.363.795.772.56621050.48632.7
150x100x5.025157193845.554.0595.976.811788.38091270.48326.3
150x100x6.02011.78354445.54.0111188.81371039481470.47922.1
150x100x8.013.87.510105365.353.913410716912812101820.46616.8
150x100x10.010511606145.223.815512319915014302110.45713.7
160x80x4.035155982045.743.3574.750.992.957.4494880.46632.7
160x80x5.027117222445.683.390.26111369.76011060.46326.4
160x80x6.021.78.338362815.623.2610570.213281.37021220.45922.1
160x80x8.015510003355.463.1612583.71631008821500.44616.9
180x80x4.040158022276.373.3989.156.711263.557899.60.50632.7
180x80x5.031119712726.313.3410868.113777.27041200.50326.3
180x80x6.0258.3311303146.253.312578.516090.28231390.49922.1
180x80x8.017.5513603776.083.215194.119811110401700.48616.8
180x80x10.013315704295.943.117410723413112101960.47713.6
180x100x4.040209263746.594.1810374.8126848541270.54632.6
180x100x5.0311511204526.534.1412590.415410310501540.54326.2
180x100x6.02511.713105246.484.114610518112012301790.53922
180x100x8.017.57.516006376.323.9917812722615015702220.52616.7
180x100x10.013518607366.193.8920714726817718602600.51713.6
200x100x4.0452012004117.234.2312082.214891.79851420.58632.5
200x100x5.0351514604977.174.1914699.418111212101720.58326.2
200x100x6.028.311.717005777.124.1417011521313214202000.57921.9
200x100x8.0207.520907056.954.0420914126716518102500.56616.7
200x100x10.015524408186.823.9424416431819521502920.55713.5
200x120x4.0452513506187.435.0213510316411513501720.62632.5
200x120x5.0351916507507.374.9716512520114116502100.62326.1
200x120x6.028.31519308747.324.9319314623716619502450.61921.9
200x120x8.02010239010807.174.8223918029820925103080.60616.6
200x120x10.0157281012607.044.7228121035625030103640.59713.4
200x150x4.04532.5158010207.676.1615813618715419402190.68632.4
200x150x5.03525194012507.626.1119316623018923902670.68326.1
200x150x6.028.320227014607.566.0622719427122328303130.67921.8
200x150x8.02013.8283018207.435.9528324234428336703960.66616.5
200x150x10.01510335021407.315.8533528641333944304710.65713.4
250x150x5.04525330015109.286.2726420132022532903370.78326
250x150x6.036.720389017709.236.2331123637826638903960.77921.8
250x150x8.026.313.8489022209.086.1239129648234050505040.76616.5
250x150x10.02010583026308.966.0246635158240961206020.75713.3
250x150x12.015.87.5646029308.775.951739065846370906840.73811.2
250x150x12.5157663030008.735.8753140067847773207040.73610.8
300x100x6.04511.7478084210.24.331816841118824003060.77921.8
300x100x8.032.57.559801050104.239920952323830803850.76616.5
300x100x10.0255711012209.94.1147424563128536804550.75713.3
300x100x12.5193801013709.593.9753427573233042905210.73610.8
300x200x6.04528.37370396011.38.2949139658844681206510.97921.6
300x200x8.032.5209390504011.28.19626504757574106008380.96616.3
300x200x10.0251511300606011.18.097546069216981300010100.95713.2
300x200x12.02011.712800685010.97.9685368510608011520011700.93811.1
300x200x12.5191113200706010.87.9487970610908281580012000.93610.6
400x200x8.0452019000652014.48.4594965211707281580011301.1716.3
400x200x10.0351523000786014.38.36115078614308881940013701.1613.1
400x200x12.028.311.726200898014.18.241310898166010302280015901.1411
400x200x12.5271127100926014.18.221360926171010602360016401.1410.6
450x250x8.051.326.3293001190016.510.51300953159010602720016301.3716.2
450x250x10.04020357001450016.410.415901160195013003350019801.3613
450x250x12.032.515.8411001670016.210.318301330226015203960023101.3410.9
450x250x12.53115425001720016.210.318901380235015704110023901.3410.5
500x300x8.057.532.5428001960018.612.617101310206014604280022001.5716.2
500x300x10.04525523002390018.512.520901600254017905270026901.5613
500x300x12.036.720606002770018.312.424201850296020906260031601.5410.9
500x300x12.53519627002870018.312.425101910307021706500032701.5410.5