RHS 160×80×4
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 | 160 mm | 6.2992 in |
| Width | 80 mm | 3.1496 in |
| Thickness, t | 4 mm | 0.15748 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 6,120,000 mm⁴ | 14.7034 in⁴ |
| Elastic modulus, Sₓ | 76,500 mm³ | 4.6683 in³ |
| Plastic modulus, Zₓ | 94,700 mm³ | 5.7789 in³ |
| Radius of gyration, rₓ | 57.7 mm | 2.2717 in |
| Distance to top fibre | 80 mm | 3.1496 in |
| Distance to bottom fibre | 80 mm | 3.1496 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 2,070,000 mm⁴ | 4.9732 in⁴ |
| Elastic modulus, S_y | 51,700 mm³ | 3.1549 in³ |
| Plastic modulus, Z_y | 58,300 mm³ | 3.5577 in³ |
| Radius of gyration, r_y | 33.5 mm | 1.3189 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 4,930,000 mm⁴ | 11.8444 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 14.4 kg/m | 9.6764 lb/ft |