StructureCalcsIPN 340
European Standard I-Beam (IPN) · EN 10365 · Europe
IPN 340 is a European taper-flange I-beam 340.0 mm deep with a 137.0 mm wide flange, weighing 68.1 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 | 340.0 mm | 13.39 in |
| Flange width, bf | 137.0 mm | 5.39 in |
| Flange thickness, tf | 18.3 mm | 0.720 in |
| Web thickness, tw | 12.2 mm | 0.480 in |
| Mass per metre | 68.1 kg/m | 45.8 lb/ft |
| Area, A | 8,680 mm² | 13.45 in² |
| Second moment, Ix | 157,000,000 mm⁴ | 377.2 in⁴ |
| Second moment, Iy | 6,740,000 mm⁴ | 16.2 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 340 the computed area agrees with the published value to 1.09% and Ix to 1.37%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Wel,x | 936,166 mm³ |
| Elastic modulus, Wel,y | 100,754 mm³ |
| Plastic modulus, Wpl,x | 1,094,655 mm³ |
| Plastic modulus, Wpl,y | 170,255 mm³ |
| Radius of gyration, rx | 134.7 mm |
| Radius of gyration, ry | 28.0 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