CHS 168.3×5

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

168.3 mm168.3 mm

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

Dimensions

PropertyMetricImperial
Thickness, t5 mm0.19685 in
Outside diameter168.3 mm6.626 in
Inside diameter158.3 mm6.2323 in

Bending about the major axis

PropertyMetricImperial
Second moment of area, Iₓ8,560,000 mm⁴20.5655 in⁴
Elastic modulus, Sₓ102,000 mm³6.2244 in³
Plastic modulus, Zₓ133,000 mm³8.1162 in³
Radius of gyration, rₓ57.8 mm2.2756 in
Distance to top fibre84.15 mm3.313 in
Distance to bottom fibre84.15 mm3.313 in

Bending about the minor axis

PropertyMetricImperial
Second moment of area, I_y8,560,000 mm⁴20.5655 in⁴
Elastic modulus, S_y102,000 mm³6.2244 in³
Plastic modulus, Z_y133,000 mm³8.1162 in³
Radius of gyration, r_y57.8 mm2.2756 in

Torsion and warping

PropertyMetricImperial
Torsion constant, J17,100,000 mm⁴41.0829 in⁴

Mass

PropertyMetricImperial
Mass per metre20.1 kg/m13.5066 lb/ft
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