StructureCalcsHD 400 x 421
Wide-Flange Column (HD) · EN 10365 · Europe
HD 400 x 421 is a heavy wide-flange column section 425.0 mm deep with a 409.0 mm wide flange, weighing 421.6 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 | 425.0 mm | 16.73 in |
| Flange width, bf | 409.0 mm | 16.10 in |
| Flange thickness, tf | 52.6 mm | 2.071 in |
| Web thickness, tw | 32.8 mm | 1.291 in |
| Mass per metre | 421.6 kg/m | 283.3 lb/ft |
| Area, A | 53,709 mm² | 83.25 in² |
| Second moment, Ix | 1,599,300,000 mm⁴ | 3,842.3 in⁴ |
| Second moment, Iy | 600,800,000 mm⁴ | 1,443.4 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 421 the computed area agrees with the published value to better than 0.01% and Ix to 0.22%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Wel,x | 7,509,701 mm³ |
| Elastic modulus, Wel,y | 2,937,968 mm³ |
| Plastic modulus, Wpl,x | 8,880,457 mm³ |
| Plastic modulus, Wpl,y | 4,489,318 mm³ |
| Radius of gyration, rx | 172.4 mm |
| Radius of gyration, ry | 105.8 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