RHS 400×200×12.5
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 | 200 mm | 7.874 in |
| Thickness, t | 12.5 mm | 0.492126 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 291,000,000 mm⁴ | 699.1303 in⁴ |
| Elastic modulus, Sₓ | 1,450,000 mm³ | 88.4844 in³ |
| Plastic modulus, Zₓ | 1,810,000 mm³ | 110.453 in³ |
| Radius of gyration, rₓ | 143 mm | 5.6299 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 | 97,400,000 mm⁴ | 234.0044 in⁴ |
| Elastic modulus, S_y | 974,000 mm³ | 59.4371 in³ |
| Plastic modulus, Z_y | 1,110,000 mm³ | 67.7364 in³ |
| Radius of gyration, r_y | 82.8 mm | 3.2598 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 234,000,000 mm⁴ | 562.1872 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 112 kg/m | 75.2605 lb/ft |