CHS 101.6×4.5
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 | 101.6 mm | 4 in |
| Inside diameter | 92.6 mm | 3.6457 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 1,620,000 mm⁴ | 3.8921 in⁴ |
| Elastic modulus, Sₓ | 31,900 mm³ | 1.9467 in³ |
| Plastic modulus, Zₓ | 42,500 mm³ | 2.5935 in³ |
| Radius of gyration, rₓ | 34.4 mm | 1.3543 in |
| Distance to top fibre | 50.8 mm | 2 in |
| Distance to bottom fibre | 50.8 mm | 2 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 1,620,000 mm⁴ | 3.8921 in⁴ |
| Elastic modulus, S_y | 31,900 mm³ | 1.9467 in³ |
| Plastic modulus, Z_y | 42,500 mm³ | 2.5935 in³ |
| Radius of gyration, r_y | 34.4 mm | 1.3543 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 3,240,000 mm⁴ | 7.7841 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 10.8 kg/m | 7.2573 lb/ft |