CHS 323.9×14.2

Circular hollow sections from Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1.

323.9 mm323.9 mm

Outline drawn from the published dimensions. Fillets and root radii are not shown.

Dimensions

PropertyMetricImperial
Thickness, t14.2 mm0.559055 in
Outside diameter323.9 mm12.752 in
Inside diameter295.5 mm11.6339 in

Bending about the major axis

PropertyMetricImperial
Second moment of area, Iₓ166,000,000 mm⁴398.8166 in⁴
Elastic modulus, Sₓ1,020,000 mm³62.2442 in³
Plastic modulus, Zₓ1,360,000 mm³82.9923 in³
Radius of gyration, rₓ110 mm4.3307 in
Distance to top fibre161.95 mm6.376 in
Distance to bottom fibre161.95 mm6.376 in

Bending about the minor axis

PropertyMetricImperial
Second moment of area, I_y166,000,000 mm⁴398.8166 in⁴
Elastic modulus, S_y1,020,000 mm³62.2442 in³
Plastic modulus, Z_y1,360,000 mm³82.9923 in³
Radius of gyration, r_y110 mm4.3307 in

Torsion and warping

PropertyMetricImperial
Torsion constant, J332,000,000 mm⁴797.6332 in⁴

Mass

PropertyMetricImperial
Mass per metre108 kg/m72.5726 lb/ft
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