Steel Beam Sizes / Europe / HD Sections / HD 400×818
HD 400×818 Steel Beam Dimensions and Properties
EN HD wide flange columns · v2026.1
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
HD 400×818 dimensions
Not to scale. Dimensions shown for reference.
Section properties
Symbols match the steel section finder. Imperial and metric values are shown side by side.
| Property | Imperial | Metric |
|---|---|---|
| Weight | 549.67 lb/ft | 818.00 kg/m |
| Depth, d | 20.24 in | 514.00 mm |
| Flange width, bf | 17.20 in | 437.00 mm |
| tw | 2.382 in | 60.500 mm |
| tf | 3.819 in | 97.000 mm |
| Area | 161.67 in² | 104,300.00 mm² |
| Ix | 9,417.84 in⁴ | 3,920,000,000 mm⁴ |
| Iy | 3,267.41 in⁴ | 1,360,000,000 mm⁴ |
| Sx | 933.66 in³ | 15,300,000 mm³ |
| Sy | 378.35 in³ | 6,200,000 mm³ |
| Zx | 1,177.76 in³ | 19,300,000 mm³ |
| Zy | 583.39 in³ | 9,560,000 mm³ |
| rx | 7.64 in | 194.00 mm |
| ry | 4.49 in | 114.00 mm |
| J | 667.90 in⁴ | 278,000,000 mm⁴ |
| Cw | 218,220.38 in⁶ | 58,600,000,000,000 mm⁶ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HD 400×818.
Lighter in HD wide flange columns
HD 400×744
- Weight
- 744.0 kg/m (-9.0%)
- Depth
- 498.0 mm (-3.1%)
- Ix
- 3,420,000,000 mm⁴ (-13%)
Heavier in HD wide flange columns
HD 400×900
- Weight
- 900.0 kg/m (+10%)
- Depth
- 531.0 mm (+3.3%)
- Ix
- 4,500,000,000 mm⁴ (+15%)
Closest Iₓ in HD wide flange columns
HD 400×677
- Weight
- 677.0 kg/m (-17%)
- Depth
- 483.0 mm (-6.0%)
- Ix
- 3,000,000,000 mm⁴ (-23%)
Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Eurocode 3 - UK National Annex · Methodology