SHS 400×400×16
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 | 16 mm | 0.629921 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 593,000,000 mm⁴ | 1,424.688 in⁴ |
| Elastic modulus, Sₓ | 2,970,000 mm³ | 181.2405 in³ |
| Plastic modulus, Zₓ | 3,480,000 mm³ | 212.3626 in³ |
| Radius of gyration, rₓ | 156 mm | 6.1417 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 | 593,000,000 mm⁴ | 1,424.688 in⁴ |
| Elastic modulus, S_y | 2,970,000 mm³ | 181.2405 in³ |
| Plastic modulus, Z_y | 3,480,000 mm³ | 212.3626 in³ |
| Radius of gyration, r_y | 156 mm | 6.1417 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 924,000,000 mm⁴ | 2,219.919 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 191 kg/m | 128.3461 lb/ft |