RHS 450×250×8
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 | 450 mm | 17.7165 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 | 301,000,000 mm⁴ | 723.1554 in⁴ |
| Elastic modulus, Sₓ | 1,340,000 mm³ | 81.7718 in³ |
| Plastic modulus, Zₓ | 1,620,000 mm³ | 98.8585 in³ |
| Radius of gyration, rₓ | 166 mm | 6.5354 in |
| Distance to top fibre | 225 mm | 8.8583 in |
| Distance to bottom fibre | 225 mm | 8.8583 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 121,000,000 mm⁴ | 290.7037 in⁴ |
| Elastic modulus, S_y | 971,000 mm³ | 59.2541 in³ |
| Plastic modulus, Z_y | 1,080,000 mm³ | 65.9056 in³ |
| Radius of gyration, r_y | 106 mm | 4.1732 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 271,000,000 mm⁴ | 651.0801 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 85.4 kg/m | 57.3862 lb/ft |