RHS 350×250×8
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 mm | 0.314961 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 164,000,000 mm⁴ | 394.0116 in⁴ |
| Elastic modulus, Sₓ | 940,000 mm³ | 57.3623 in³ |
| Plastic modulus, Zₓ | 1,120,000 mm³ | 68.3466 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 | 98,000,000 mm⁴ | 235.4459 in⁴ |
| Elastic modulus, S_y | 784,000 mm³ | 47.8426 in³ |
| Plastic modulus, Z_y | 888,000 mm³ | 54.1891 in³ |
| Radius of gyration, r_y | 103 mm | 4.0551 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 190,000,000 mm⁴ | 456.4768 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 72.8 kg/m | 48.9193 lb/ft |