RHS 180×100×8.8
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 | 180 mm | 7.0866 in |
| Width | 100 mm | 3.937 in |
| Thickness, t | 8.8 mm | 0.346457 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 18,500,000 mm⁴ | 44.4464 in⁴ |
| Elastic modulus, Sₓ | 205,000 mm³ | 12.5099 in³ |
| Plastic modulus, Zₓ | 259,000 mm³ | 15.8052 in³ |
| Radius of gyration, rₓ | 63.8 mm | 2.5118 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 | 7,200,000 mm⁴ | 17.2981 in⁴ |
| Elastic modulus, S_y | 144,000 mm³ | 8.7874 in³ |
| Plastic modulus, Z_y | 170,000 mm³ | 10.374 in³ |
| Radius of gyration, r_y | 39.8 mm | 1.5669 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 16,800,000 mm⁴ | 40.3622 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 35.6 kg/m | 23.9221 lb/ft |