RHS 80×40×6.3
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 | 80 mm | 3.1496 in |
| Width | 40 mm | 1.5748 in |
| Thickness, t | 6.3 mm | 0.248031 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 933,000 mm⁴ | 2.2415 in⁴ |
| Elastic modulus, Sₓ | 23,300 mm³ | 1.4219 in³ |
| Plastic modulus, Zₓ | 31,100 mm³ | 1.8978 in³ |
| Radius of gyration, rₓ | 26.7 mm | 1.0512 in |
| Distance to top fibre | 40 mm | 1.5748 in |
| Distance to bottom fibre | 40 mm | 1.5748 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 292,000 mm⁴ | 0.701533 in⁴ |
| Elastic modulus, S_y | 14,600 mm³ | 0.890947 in³ |
| Plastic modulus, Z_y | 18,400 mm³ | 1.1228 in³ |
| Radius of gyration, r_y | 14.9 mm | 0.586614 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 756,000 mm⁴ | 1.8163 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 10.3 kg/m | 6.9213 lb/ft |