CHS 355.6×12.5

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

355.6 mm355.6 mm

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

Dimensions

PropertyMetricImperial
Thickness, t12.5 mm0.492126 in
Outside diameter355.6 mm14 in
Inside diameter330.6 mm13.0157 in

Bending about the major axis

PropertyMetricImperial
Second moment of area, Iₓ199,000,000 mm⁴478.0994 in⁴
Elastic modulus, Sₓ1,120,000 mm³68.3466 in³
Plastic modulus, Zₓ1,470,000 mm³89.7049 in³
Radius of gyration, rₓ121 mm4.7638 in
Distance to top fibre177.8 mm7 in
Distance to bottom fibre177.8 mm7 in

Bending about the minor axis

PropertyMetricImperial
Second moment of area, I_y199,000,000 mm⁴478.0994 in⁴
Elastic modulus, S_y1,120,000 mm³68.3466 in³
Plastic modulus, Z_y1,470,000 mm³89.7049 in³
Radius of gyration, r_y121 mm4.7638 in

Torsion and warping

PropertyMetricImperial
Torsion constant, J397,000,000 mm⁴953.7963 in⁴

Mass

PropertyMetricImperial
Mass per metre106 kg/m71.2287 lb/ft
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