IPN 400
IPN taper flange beams 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 |
|---|---|---|
| Depth, d | 400 mm | 15.748 in |
| Flange width, b_f | 155 mm | 6.1024 in |
| Web thickness, t_w | 14.4 mm | 0.566929 in |
| Flange thickness, t_f | 21.6 mm | 0.850394 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 292,100,000 mm⁴ | 701.7731 in⁴ |
| Elastic modulus, Sₓ | 1,460,000 mm³ | 89.0947 in³ |
| Plastic modulus, Zₓ | 1,714,000 mm³ | 104.5947 in³ |
| Radius of gyration, rₓ | 157 mm | 6.1811 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 | 11,600,000 mm⁴ | 27.8691 in⁴ |
| Elastic modulus, S_y | 149,000 mm³ | 9.0925 in³ |
| Plastic modulus, Z_y | 253,000 mm³ | 15.439 in³ |
| Radius of gyration, r_y | 31 mm | 1.2205 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 1,700,000 mm⁴ | 4.0843 in⁴ |
| Warping constant, C_w | 4.20000e+11 mm⁶ | 1,564.037 in⁶ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 92.4 kg/m | 62.0899 lb/ft |