RHS 400×200×8
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 | 400 mm | 15.748 in |
| Width | 200 mm | 7.874 in |
| Thickness, t | 8 mm | 0.314961 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 196,000,000 mm⁴ | 470.8919 in⁴ |
| Elastic modulus, Sₓ | 978,000 mm³ | 59.6812 in³ |
| Plastic modulus, Zₓ | 1,200,000 mm³ | 73.2285 in³ |
| Radius of gyration, rₓ | 145 mm | 5.7087 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 | 66,600,000 mm⁴ | 160.0071 in⁴ |
| Elastic modulus, S_y | 666,000 mm³ | 40.6418 in³ |
| Plastic modulus, Z_y | 743,000 mm³ | 45.3406 in³ |
| Radius of gyration, r_y | 84.7 mm | 3.3346 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 157,000,000 mm⁴ | 377.194 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 72.8 kg/m | 48.9193 lb/ft |