SHS 400×400×12.5
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 | 12.5 mm | 0.492126 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 478,000,000 mm⁴ | 1,148.4 in⁴ |
| Elastic modulus, Sₓ | 2,390,000 mm³ | 145.8467 in³ |
| Plastic modulus, Zₓ | 2,780,000 mm³ | 169.646 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 | 478,000,000 mm⁴ | 1,148.4 in⁴ |
| Elastic modulus, S_y | 2,390,000 mm³ | 145.8467 in³ |
| Plastic modulus, Z_y | 2,780,000 mm³ | 169.646 in³ |
| Radius of gyration, r_y | 158 mm | 6.2205 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 739,000,000 mm⁴ | 1,775.455 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 151 kg/m | 101.4673 lb/ft |