CHS 88.9×4.5
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 | 88.9 mm | 3.5 in |
| Inside diameter | 79.9 mm | 3.1457 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 1,070,000 mm⁴ | 2.5707 in⁴ |
| Elastic modulus, Sₓ | 24,000 mm³ | 1.4646 in³ |
| Plastic modulus, Zₓ | 32,100 mm³ | 1.9589 in³ |
| Radius of gyration, rₓ | 29.9 mm | 1.1772 in |
| Distance to top fibre | 44.45 mm | 1.75 in |
| Distance to bottom fibre | 44.45 mm | 1.75 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 1,070,000 mm⁴ | 2.5707 in⁴ |
| Elastic modulus, S_y | 24,000 mm³ | 1.4646 in³ |
| Plastic modulus, Z_y | 32,100 mm³ | 1.9589 in³ |
| Radius of gyration, r_y | 29.9 mm | 1.1772 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 2,130,000 mm⁴ | 5.1173 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 9.37 kg/m | 6.2963 lb/ft |