CHS 139.7×4.5
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 | 4.5 mm | 0.177165 in |
| Outside diameter | 139.7 mm | 5.5 in |
| Inside diameter | 130.7 mm | 5.1457 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 4,370,000 mm⁴ | 10.499 in⁴ |
| Elastic modulus, Sₓ | 62,600 mm³ | 3.8201 in³ |
| Plastic modulus, Zₓ | 82,300 mm³ | 5.0223 in³ |
| Radius of gyration, rₓ | 47.8 mm | 1.8819 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 | 4,370,000 mm⁴ | 10.499 in⁴ |
| Elastic modulus, S_y | 62,600 mm³ | 3.8201 in³ |
| Plastic modulus, Z_y | 82,300 mm³ | 5.0223 in³ |
| Radius of gyration, r_y | 47.8 mm | 1.8819 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 8,740,000 mm⁴ | 20.9979 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 15 kg/m | 10.0795 lb/ft |