RHS 50×30×4
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 | 50 mm | 1.9685 in |
| Width | 30 mm | 1.1811 in |
| Thickness, t | 4 mm | 0.15748 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 165,000 mm⁴ | 0.396414 in⁴ |
| Elastic modulus, Sₓ | 6,600 mm³ | 0.402757 in³ |
| Plastic modulus, Zₓ | 8,590 mm³ | 0.524194 in³ |
| Radius of gyration, rₓ | 17.2 mm | 0.677165 in |
| Distance to top fibre | 25 mm | 0.984252 in |
| Distance to bottom fibre | 25 mm | 0.984252 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 70,800 mm⁴ | 0.170098 in⁴ |
| Elastic modulus, S_y | 4,720 mm³ | 0.288032 in³ |
| Plastic modulus, Z_y | 5,880 mm³ | 0.35882 in³ |
| Radius of gyration, r_y | 11.3 mm | 0.444882 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 166,000 mm⁴ | 0.398817 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 4.39 kg/m | 2.9499 lb/ft |