StructureCalcsHD 400 x 990
Wide-Flange Column (HD) · EN 10365 · Europe
HD 400 x 990 is a heavy wide-flange column section 550.0 mm deep with a 448.0 mm wide flange, weighing 991.0 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 | 550.0 mm | 21.65 in |
| Flange width, bf | 448.0 mm | 17.64 in |
| Flange thickness, tf | 115.0 mm | 4.528 in |
| Web thickness, tw | 71.9 mm | 2.831 in |
| Mass per metre | 991.0 kg/m | 665.9 lb/ft |
| Area, A | 126,241 mm² | 195.67 in² |
| Second moment, Ix | 5,189,070,000 mm⁴ | 12,466.8 in⁴ |
| Second moment, Iy | 1,733,800,000 mm⁴ | 4,165.5 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 990 the computed area agrees with the published value to 0.12% and Ix to 0.07%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Wel,x | 18,882,329 mm³ |
| Elastic modulus, Wel,y | 7,740,428 mm³ |
| Plastic modulus, Wpl,x | 24,305,244 mm³ |
| Plastic modulus, Wpl,y | 11,967,927 mm³ |
| Radius of gyration, rx | 202.7 mm |
| Radius of gyration, ry | 117.1 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