CHS 139.7×3.6
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 | 3.6 mm | 0.141732 in |
| Outside diameter | 139.7 mm | 5.5 in |
| Inside diameter | 132.5 mm | 5.2165 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 3,570,000 mm⁴ | 8.577 in⁴ |
| Elastic modulus, Sₓ | 51,100 mm³ | 3.1183 in³ |
| Plastic modulus, Zₓ | 66,700 mm³ | 4.0703 in³ |
| Radius of gyration, rₓ | 48.1 mm | 1.8937 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 | 3,570,000 mm⁴ | 8.577 in⁴ |
| Elastic modulus, S_y | 51,100 mm³ | 3.1183 in³ |
| Plastic modulus, Z_y | 66,700 mm³ | 4.0703 in³ |
| Radius of gyration, r_y | 48.1 mm | 1.8937 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 7,130,000 mm⁴ | 17.1299 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 12.1 kg/m | 8.1308 lb/ft |