RHS 180×100×5
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 | 180 mm | 7.0866 in |
| Width | 100 mm | 3.937 in |
| Thickness, t | 5 mm | 0.19685 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 11,500,000 mm⁴ | 27.6289 in⁴ |
| Elastic modulus, Sₓ | 128,000 mm³ | 7.811 in³ |
| Plastic modulus, Zₓ | 157,000 mm³ | 9.5807 in³ |
| Radius of gyration, rₓ | 65.7 mm | 2.5866 in |
| Distance to top fibre | 90 mm | 3.5433 in |
| Distance to bottom fibre | 90 mm | 3.5433 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 4,600,000 mm⁴ | 11.0515 in⁴ |
| Elastic modulus, S_y | 92,000 mm³ | 5.6142 in³ |
| Plastic modulus, Z_y | 104,000 mm³ | 6.3465 in³ |
| Radius of gyration, r_y | 41.5 mm | 1.6339 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 10,400,000 mm⁴ | 24.9861 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 21 kg/m | 14.1113 lb/ft |