SHS 400×400×11
Square 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 | 400 mm | 15.748 in |
| Width | 400 mm | 15.748 in |
| Thickness, t | 11 mm | 0.433071 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 427,000,000 mm⁴ | 1,025.872 in⁴ |
| Elastic modulus, Sₓ | 2,130,000 mm³ | 129.9806 in³ |
| Plastic modulus, Zₓ | 2,470,000 mm³ | 150.7286 in³ |
| Radius of gyration, rₓ | 158 mm | 6.2205 in |
| Distance to top fibre | 200 mm | 7.874 in |
| Distance to bottom fibre | 200 mm | 7.874 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 427,000,000 mm⁴ | 1,025.872 in⁴ |
| Elastic modulus, S_y | 2,130,000 mm³ | 129.9806 in³ |
| Plastic modulus, Z_y | 2,470,000 mm³ | 150.7286 in³ |
| Radius of gyration, r_y | 158 mm | 6.2205 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 657,000,000 mm⁴ | 1,578.449 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 133 kg/m | 89.3719 lb/ft |