UPN 400
UPN taper flange channels 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 | 110 mm | 4.3307 in |
| Web thickness, t_w | 14 mm | 0.551181 in |
| Flange thickness, t_f | 18 mm | 0.708661 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 204,000,000 mm⁴ | 490.112 in⁴ |
| Elastic modulus, Sₓ | 1,020,000 mm³ | 62.2442 in³ |
| Plastic modulus, Zₓ | 1,240,000 mm³ | 75.6694 in³ |
| Radius of gyration, rₓ | 149 mm | 5.8661 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 | 8,460,000 mm⁴ | 20.3252 in⁴ |
| Elastic modulus, S_y | 102,000 mm³ | 6.2244 in³ |
| Plastic modulus, Z_y | 190,000 mm³ | 11.5945 in³ |
| Radius of gyration, r_y | 30.4 mm | 1.1969 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 816,000 mm⁴ | 1.9604 in⁴ |
| Warping constant, C_w | 2.21000e+11 mm⁶ | 822.9813 in⁶ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 71.8 kg/m | 48.2474 lb/ft |