RHS 90×50×4
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 | 90 mm | 3.5433 in |
| Width | 50 mm | 1.9685 in |
| Thickness, t | 4 mm | 0.15748 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 1,070,000 mm⁴ | 2.5707 in⁴ |
| Elastic modulus, Sₓ | 23,800 mm³ | 1.4524 in³ |
| Plastic modulus, Zₓ | 29,800 mm³ | 1.8185 in³ |
| Radius of gyration, rₓ | 32.1 mm | 1.2638 in |
| Distance to top fibre | 45 mm | 1.7717 in |
| Distance to bottom fibre | 45 mm | 1.7717 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 419,000 mm⁴ | 1.0067 in⁴ |
| Elastic modulus, S_y | 16,800 mm³ | 1.0252 in³ |
| Plastic modulus, Z_y | 19,600 mm³ | 1.1961 in³ |
| Radius of gyration, r_y | 20.1 mm | 0.791339 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 975,000 mm⁴ | 2.3424 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 8.15 kg/m | 5.4765 lb/ft |