RHS 250×100×12.5
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 | 250 mm | 9.8425 in |
| Width | 100 mm | 3.937 in |
| Thickness, t | 12.5 mm | 0.492126 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 56,200,000 mm⁴ | 135.021 in⁴ |
| Elastic modulus, Sₓ | 450,000 mm³ | 27.4607 in³ |
| Plastic modulus, Zₓ | 592,000 mm³ | 36.1261 in³ |
| Radius of gyration, rₓ | 84.1 mm | 3.311 in |
| Distance to top fibre | 125 mm | 4.9213 in |
| Distance to bottom fibre | 125 mm | 4.9213 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 12,400,000 mm⁴ | 29.7911 in⁴ |
| Elastic modulus, S_y | 249,000 mm³ | 15.1949 in³ |
| Plastic modulus, Z_y | 299,000 mm³ | 18.2461 in³ |
| Radius of gyration, r_y | 39.6 mm | 1.5591 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 34,400,000 mm⁴ | 82.6463 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 62.5 kg/m | 41.9981 lb/ft |