StructureCalcsHD 400 x 551
Wide-Flange Column (HD) · EN 10365 · Europe
HD 400 x 551 is a heavy wide-flange column section 455.0 mm deep with a 418.0 mm wide flange, weighing 550.6 kg/m. The dimensions below are the published EN 10365 values; the drawing is generated from them.
HD sections are heavy wide-flange columns rolled for high-rise and transfer work, extending the HE family upward.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 455.0 mm | 17.91 in |
| Flange width, bf | 418.0 mm | 16.46 in |
| Flange thickness, tf | 67.6 mm | 2.661 in |
| Web thickness, tw | 42.0 mm | 1.654 in |
| Mass per metre | 550.6 kg/m | 370.0 lb/ft |
| Area, A | 70,138 mm² | 108.71 in² |
| Second moment, Ix | 2,261,100,000 mm⁴ | 5,432.3 in⁴ |
| Second moment, Iy | 825,000,000 mm⁴ | 1,982.1 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 HD 400 x 551 the computed area agrees with the published value to better than 0.01% and Ix to better than 0.01%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Wel,x | 9,938,910 mm³ |
| Elastic modulus, Wel,y | 3,947,117 mm³ |
| Plastic modulus, Wpl,x | 12,050,777 mm³ |
| Plastic modulus, Wpl,y | 6,051,406 mm³ |
| Radius of gyration, rx | 179.5 mm |
| Radius of gyration, ry | 108.5 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