RHS 450×250×12.5
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 | 12.5 mm | 0.492126 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 450,000,000 mm⁴ | 1,081.129 in⁴ |
| Elastic modulus, Sₓ | 2,000,000 mm³ | 122.0475 in³ |
| Plastic modulus, Zₓ | 2,460,000 mm³ | 150.1184 in³ |
| Radius of gyration, rₓ | 164 mm | 6.4567 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 | 180,000,000 mm⁴ | 432.4517 in⁴ |
| Elastic modulus, S_y | 1,440,000 mm³ | 87.8742 in³ |
| Plastic modulus, Z_y | 1,630,000 mm³ | 99.4687 in³ |
| Radius of gyration, r_y | 104 mm | 4.0945 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 407,000,000 mm⁴ | 977.8214 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 131 kg/m | 88.0279 lb/ft |