CHS 33.7×2.9

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

33.7 mm33.7 mm

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

Dimensions

PropertyMetricImperial
Thickness, t2.9 mm0.114173 in
Outside diameter33.7 mm1.3268 in
Inside diameter27.9 mm1.0984 in

Bending about the major axis

PropertyMetricImperial
Second moment of area, Iₓ33,600 mm⁴0.080724 in⁴
Elastic modulus, Sₓ1,990 mm³0.121437 in³
Plastic modulus, Zₓ2,760 mm³0.168426 in³
Radius of gyration, rₓ10.9 mm0.429134 in
Distance to top fibre16.85 mm0.663386 in
Distance to bottom fibre16.85 mm0.663386 in

Bending about the minor axis

PropertyMetricImperial
Second moment of area, I_y33,600 mm⁴0.080724 in⁴
Elastic modulus, S_y1,990 mm³0.121437 in³
Plastic modulus, Z_y2,760 mm³0.168426 in³
Radius of gyration, r_y10.9 mm0.429134 in

Torsion and warping

PropertyMetricImperial
Torsion constant, J67,100 mm⁴0.161208 in⁴

Mass

PropertyMetricImperial
Mass per metre2.2 kg/m1.4783 lb/ft
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