CHS 139.7×4
Circular hollow sections from Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1.
Outline drawn from the published dimensions. Fillets and root radii are not shown.
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Thickness, t | 4 mm | 0.15748 in |
| Outside diameter | 139.7 mm | 5.5 in |
| Inside diameter | 131.7 mm | 5.185 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 3,930,000 mm⁴ | 9.4419 in⁴ |
| Elastic modulus, Sₓ | 56,200 mm³ | 3.4295 in³ |
| Plastic modulus, Zₓ | 73,700 mm³ | 4.4975 in³ |
| Radius of gyration, rₓ | 48 mm | 1.8898 in |
| Distance to top fibre | 69.85 mm | 2.75 in |
| Distance to bottom fibre | 69.85 mm | 2.75 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 3,930,000 mm⁴ | 9.4419 in⁴ |
| Elastic modulus, S_y | 56,200 mm³ | 3.4295 in³ |
| Plastic modulus, Z_y | 73,700 mm³ | 4.4975 in³ |
| Radius of gyration, r_y | 48 mm | 1.8898 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 7,860,000 mm⁴ | 18.8837 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 13.4 kg/m | 9.0044 lb/ft |