StructureCalcsIPN 280
European Standard I-Beam (IPN) · EN 10365 · Europe
IPN 280 is a European taper-flange I-beam 280.0 mm deep with a 119.0 mm wide flange, weighing 48.0 kg/m. The dimensions below are the published EN 10365 values; the drawing is generated from them.
IPN beams are the classic European taper-flange I — a legacy series still rolled, with the 14% flange taper reproduced in the drawing.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 280.0 mm | 11.02 in |
| Flange width, bf | 119.0 mm | 4.69 in |
| Flange thickness, tf | 15.2 mm | 0.598 in |
| Web thickness, tw | 10.1 mm | 0.398 in |
| Mass per metre | 48.0 kg/m | 32.3 lb/ft |
| Area, A | 6,110 mm² | 9.47 in² |
| Second moment, Ix | 75,900,000 mm⁴ | 182.4 in⁴ |
| Second moment, Iy | 3,640,000 mm⁴ | 8.7 in⁴ |
Derived section properties
Integrated from the section's own outline including the root and toe radii, whose arcs are integrated analytically rather than approximated by facets. For IPN 280 the computed area agrees with the published value to 1.12% and Ix to 1.39%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Wel,x | 549,652 mm³ |
| Elastic modulus, Wel,y | 62,679 mm³ |
| Plastic modulus, Wpl,x | 640,276 mm³ |
| Plastic modulus, Wpl,y | 105,556 mm³ |
| Radius of gyration, rx | 111.6 mm |
| Radius of gyration, ry | 24.6 mm |
Wel is the elastic modulus and Wpl the plastic modulus, following Eurocode 3 notation.
Neighbouring sizes
Where these numbers come from
Published EN 10365 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API