RHS 120×80×8
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 | 120 mm | 4.7244 in |
| Width | 80 mm | 3.1496 in |
| Thickness, t | 8 mm | 0.314961 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 5,250,000 mm⁴ | 12.6132 in⁴ |
| Elastic modulus, Sₓ | 87,500 mm³ | 5.3396 in³ |
| Plastic modulus, Zₓ | 111,000 mm³ | 6.7736 in³ |
| Radius of gyration, rₓ | 42.7 mm | 1.6811 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 | 2,730,000 mm⁴ | 6.5589 in⁴ |
| Elastic modulus, S_y | 68,100 mm³ | 4.1557 in³ |
| Plastic modulus, Z_y | 82,600 mm³ | 5.0406 in³ |
| Radius of gyration, r_y | 30.8 mm | 1.2126 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 5,870,000 mm⁴ | 14.1027 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 22.6 kg/m | 15.1865 lb/ft |