RHS 120×80×5
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 | 120 mm | 4.7244 in |
| Width | 80 mm | 3.1496 in |
| Thickness, t | 5 mm | 0.19685 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 3,650,000 mm⁴ | 8.7692 in⁴ |
| Elastic modulus, Sₓ | 60,900 mm³ | 3.7163 in³ |
| Plastic modulus, Zₓ | 74,600 mm³ | 4.5524 in³ |
| Radius of gyration, rₓ | 44.2 mm | 1.7402 in |
| Distance to top fibre | 60 mm | 2.3622 in |
| Distance to bottom fibre | 60 mm | 2.3622 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 1,930,000 mm⁴ | 4.6368 in⁴ |
| Elastic modulus, S_y | 48,200 mm³ | 2.9413 in³ |
| Plastic modulus, Z_y | 56,100 mm³ | 3.4234 in³ |
| Radius of gyration, r_y | 32.1 mm | 1.2638 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 4,010,000 mm⁴ | 9.6341 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 14.7 kg/m | 9.8779 lb/ft |