CHS 168.3×6.3
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 | 6.3 mm | 0.248031 in |
| Outside diameter | 168.3 mm | 6.626 in |
| Inside diameter | 155.7 mm | 6.1299 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 10,500,000 mm⁴ | 25.2264 in⁴ |
| Elastic modulus, Sₓ | 125,000 mm³ | 7.628 in³ |
| Plastic modulus, Zₓ | 165,000 mm³ | 10.0689 in³ |
| Radius of gyration, rₓ | 57.3 mm | 2.2559 in |
| Distance to top fibre | 84.15 mm | 3.313 in |
| Distance to bottom fibre | 84.15 mm | 3.313 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 10,500,000 mm⁴ | 25.2264 in⁴ |
| Elastic modulus, S_y | 125,000 mm³ | 7.628 in³ |
| Plastic modulus, Z_y | 165,000 mm³ | 10.0689 in³ |
| Radius of gyration, r_y | 57.3 mm | 2.2559 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 21,100,000 mm⁴ | 50.693 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 25.2 kg/m | 16.9336 lb/ft |