CHS 168.3×12.5
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 | 12.5 mm | 0.492126 in |
| Outside diameter | 168.3 mm | 6.626 in |
| Inside diameter | 143.3 mm | 5.6417 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 18,700,000 mm⁴ | 44.9269 in⁴ |
| Elastic modulus, Sₓ | 222,000 mm³ | 13.5473 in³ |
| Plastic modulus, Zₓ | 304,000 mm³ | 18.5512 in³ |
| Radius of gyration, rₓ | 55.3 mm | 2.1772 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 | 18,700,000 mm⁴ | 44.9269 in⁴ |
| Elastic modulus, S_y | 222,000 mm³ | 13.5473 in³ |
| Plastic modulus, Z_y | 304,000 mm³ | 18.5512 in³ |
| Radius of gyration, r_y | 55.3 mm | 2.1772 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 37,400,000 mm⁴ | 89.8539 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 48 kg/m | 32.2545 lb/ft |