RHS 350×250×8.8
Rectangular 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 |
|---|---|---|
| Height | 350 mm | 13.7795 in |
| Width | 250 mm | 9.8425 in |
| Thickness, t | 8.8 mm | 0.346457 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 179,000,000 mm⁴ | 430.0492 in⁴ |
| Elastic modulus, Sₓ | 1,020,000 mm³ | 62.2442 in³ |
| Plastic modulus, Zₓ | 1,220,000 mm³ | 74.449 in³ |
| Radius of gyration, rₓ | 133 mm | 5.2362 in |
| Distance to top fibre | 175 mm | 6.8898 in |
| Distance to bottom fibre | 175 mm | 6.8898 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 107,000,000 mm⁴ | 257.0685 in⁴ |
| Elastic modulus, S_y | 853,000 mm³ | 52.0533 in³ |
| Plastic modulus, Z_y | 970,000 mm³ | 59.193 in³ |
| Radius of gyration, r_y | 102 mm | 4.0157 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 208,000,000 mm⁴ | 499.722 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 79.8 kg/m | 53.6231 lb/ft |