RHS 350×250×7.1
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 | 7.1 mm | 0.279528 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 147,000,000 mm⁴ | 353.1689 in⁴ |
| Elastic modulus, Sₓ | 843,000 mm³ | 51.443 in³ |
| Plastic modulus, Zₓ | 999,000 mm³ | 60.9627 in³ |
| Radius of gyration, rₓ | 134 mm | 5.2756 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 | 88,000,000 mm⁴ | 211.4208 in⁴ |
| Elastic modulus, S_y | 704,000 mm³ | 42.9607 in³ |
| Plastic modulus, Z_y | 794,000 mm³ | 48.4529 in³ |
| Radius of gyration, r_y | 103 mm | 4.0551 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 170,000,000 mm⁴ | 408.4266 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 64.9 kg/m | 43.6108 lb/ft |