RHS 180×100×12.5
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 | 12.5 mm | 0.492126 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 23,800,000 mm⁴ | 57.1797 in⁴ |
| Elastic modulus, Sₓ | 265,000 mm³ | 16.1713 in³ |
| Plastic modulus, Zₓ | 344,000 mm³ | 20.9922 in³ |
| Radius of gyration, rₓ | 62 mm | 2.4409 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 | 9,080,000 mm⁴ | 21.8148 in⁴ |
| Elastic modulus, S_y | 182,000 mm³ | 11.1063 in³ |
| Plastic modulus, Z_y | 223,000 mm³ | 13.6083 in³ |
| Radius of gyration, r_y | 38.2 mm | 1.5039 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 21,900,000 mm⁴ | 52.615 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 48.7 kg/m | 32.7249 lb/ft |