RHS 400×150×12.5
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 | 400 mm | 15.748 in |
| Width | 150 mm | 5.9055 in |
| Thickness, t | 12.5 mm | 0.492126 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 244,000,000 mm⁴ | 586.2123 in⁴ |
| Elastic modulus, Sₓ | 1,220,000 mm³ | 74.449 in³ |
| Plastic modulus, Zₓ | 1,570,000 mm³ | 95.8073 in³ |
| Radius of gyration, rₓ | 137 mm | 5.3937 in |
| Distance to top fibre | 200 mm | 7.874 in |
| Distance to bottom fibre | 200 mm | 7.874 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 50,400,000 mm⁴ | 121.0865 in⁴ |
| Elastic modulus, S_y | 672,000 mm³ | 41.008 in³ |
| Plastic modulus, Z_y | 772,000 mm³ | 47.1103 in³ |
| Radius of gyration, r_y | 62.4 mm | 2.4567 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 138,000,000 mm⁴ | 331.5463 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 102 kg/m | 68.5408 lb/ft |