IPN 280
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 | 280 mm | 11.0236 in |
| Flange width, b_f | 119 mm | 4.685 in |
| Web thickness, t_w | 10.1 mm | 0.397638 in |
| Flange thickness, t_f | 15.2 mm | 0.598425 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 75,900,000 mm⁴ | 182.3505 in⁴ |
| Elastic modulus, Sₓ | 542,000 mm³ | 33.0749 in³ |
| Plastic modulus, Zₓ | 632,000 mm³ | 38.567 in³ |
| Radius of gyration, rₓ | 111 mm | 4.3701 in |
| Distance to top fibre | 140 mm | 5.5118 in |
| Distance to bottom fibre | 140 mm | 5.5118 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 3,640,000 mm⁴ | 8.7451 in⁴ |
| Elastic modulus, S_y | 61,200 mm³ | 3.7347 in³ |
| Plastic modulus, Z_y | 103,000 mm³ | 6.2854 in³ |
| Radius of gyration, r_y | 25 mm | 0.984252 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 442,000 mm⁴ | 1.0619 in⁴ |
| Warping constant, C_w | 6.46000e+10 mm⁶ | 240.5638 in⁶ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 47.9 kg/m | 32.1873 lb/ft |