Steel Beam Sizes / Europe / HE Sections / HE 340 AA
HE 340 AA Steel Beam Dimensions and Properties
EN HE wide flange sections · v2026.1
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
HE 340 AA 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 | 53.02 lb/ft | 78.90 kg/m |
| Depth, d | 12.60 in | 320.00 mm |
| Flange width, bf | 11.81 in | 300.00 mm |
| tw | 0.335 in | 8.500 mm |
| tf | 0.453 in | 11.500 mm |
| Area | 15.50 in² | 10,000.00 mm² |
| Ix | 470.89 in⁴ | 196,000,000 mm⁴ |
| Iy | 124.45 in⁴ | 51,800,000 mm⁴ |
| Sx | 74.45 in³ | 1,220,000 mm³ |
| Sy | 21.11 in³ | 346,000.00 mm³ |
| Zx | 81.77 in³ | 1,340,000 mm³ |
| Zy | 32.28 in³ | 529,000.00 mm³ |
| rx | 5.51 in | 140.00 mm |
| ry | 2.83 in | 71.80 mm |
| J | 1.44 in⁴ | 600,000.00 mm⁴ |
| Cw | 4,580.39 in⁶ | 1,230,000,000,000 mm⁶ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HE 340 AA.
Lighter in HE wide flange sections
HE 280 A
- Weight
- 76.4 kg/m (-3.2%)
- Depth
- 270.0 mm (-16%)
- Ix
- 137,000,000 mm⁴ (-30%)
Heavier in HE wide flange sections
HE 200 C
- Weight
- 81.9 kg/m (+3.8%)
- Depth
- 210.0 mm (-34%)
- Ix
- 80,300,000 mm⁴ (-59%)
Closest Iₓ in HE wide flange sections
HE 280 B
- Weight
- 103.0 kg/m (+31%)
- Depth
- 280.0 mm (-12%)
- Ix
- 193,000,000 mm⁴ (-1.5%)
Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Eurocode 3 - UK National Annex · Methodology