RHS 90×50×8
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 | 90 mm | 3.5433 in |
| Width | 50 mm | 1.9685 in |
| Thickness, t | 8 mm | 0.314961 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 1,740,000 mm⁴ | 4.1804 in⁴ |
| Elastic modulus, Sₓ | 38,600 mm³ | 2.3555 in³ |
| Plastic modulus, Zₓ | 51,400 mm³ | 3.1366 in³ |
| Radius of gyration, rₓ | 30.1 mm | 1.185 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 | 646,000 mm⁴ | 1.552 in⁴ |
| Elastic modulus, S_y | 25,800 mm³ | 1.5744 in³ |
| Plastic modulus, Z_y | 32,900 mm³ | 2.0077 in³ |
| Radius of gyration, r_y | 18.4 mm | 0.724409 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 1,600,000 mm⁴ | 3.844 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 15 kg/m | 10.0795 lb/ft |