CHS 139.7×8
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 | 8 mm | 0.314961 in |
| Outside diameter | 139.7 mm | 5.5 in |
| Inside diameter | 123.7 mm | 4.8701 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 7,200,000 mm⁴ | 17.2981 in⁴ |
| Elastic modulus, Sₓ | 103,000 mm³ | 6.2854 in³ |
| Plastic modulus, Zₓ | 139,000 mm³ | 8.4823 in³ |
| Radius of gyration, rₓ | 46.6 mm | 1.8346 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 | 7,200,000 mm⁴ | 17.2981 in⁴ |
| Elastic modulus, S_y | 103,000 mm³ | 6.2854 in³ |
| Plastic modulus, Z_y | 139,000 mm³ | 8.4823 in³ |
| Radius of gyration, r_y | 46.6 mm | 1.8346 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 14,400,000 mm⁴ | 34.5961 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 26 kg/m | 17.4712 lb/ft |