RHS 300×250×7.1
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 | 300 mm | 11.811 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 | 103,000,000 mm⁴ | 247.4585 in⁴ |
| Elastic modulus, Sₓ | 683,000 mm³ | 41.6792 in³ |
| Plastic modulus, Zₓ | 802,000 mm³ | 48.941 in³ |
| Radius of gyration, rₓ | 116 mm | 4.5669 in |
| Distance to top fibre | 150 mm | 5.9055 in |
| Distance to bottom fibre | 150 mm | 5.9055 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 77,500,000 mm⁴ | 186.1945 in⁴ |
| Elastic modulus, S_y | 620,000 mm³ | 37.8347 in³ |
| Plastic modulus, Z_y | 708,000 mm³ | 43.2048 in³ |
| Radius of gyration, r_y | 101 mm | 3.9764 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 136,000,000 mm⁴ | 326.7413 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 59.3 kg/m | 39.8478 lb/ft |