Steel Beam Sizes / Europe / HE Sections / HE 340 A
HE 340 A Dimensions, Weight and Section Properties
EN HE wide flange sections · v2026.1
HE 340 A: 330 mm depth, 300 mm flange width, 105 kg/m weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
HE 340 A 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 | 70.56 lb/ft | 105.00 kg/m |
| Depth, d | 12.99 in | 330.00 mm |
| Flange width, bf | 11.81 in | 300.00 mm |
| tw | 0.374 in | 9.500 mm |
| tf | 0.650 in | 16.500 mm |
| Area | 20.77 in² | 13,400.00 mm² |
| Ix | 665.50 in⁴ | 277,000,000 mm⁴ |
| Iy | 178.75 in⁴ | 74,400,000 mm⁴ |
| Sx | 102.52 in³ | 1,680,000 mm³ |
| Sy | 30.27 in³ | 496,000.00 mm³ |
| Zx | 112.89 in³ | 1,850,000 mm³ |
| Zy | 46.13 in³ | 756,000.00 mm³ |
| rx | 5.67 in | 144.00 mm |
| ry | 2.94 in | 74.60 mm |
| J | 3.15 in⁴ | 1,310,000 mm⁴ |
| Cw | 6,777.49 in⁶ | 1,820,000,000,000 mm⁶ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus HE 340 A.
Lighter in HE wide flange sections
HE 200 M
- Weight
- 103.0 kg/m (-1.9%)
- Depth
- 220.0 mm (-33%)
- Ix
- 106,000,000 mm⁴ (-62%)
Heavier in HE wide flange sections
HE 500 AA
- Weight
- 107.0 kg/m (+1.9%)
- Depth
- 472.0 mm (+43%)
- Ix
- 546,000,000 mm⁴ (+97%)
Another Iₓ option in HE wide flange sections
HE 280 C
- Weight
- 145.0 kg/m (+38%)
- Depth
- 295.0 mm (-11%)
- Ix
- 288,000,000 mm⁴ (+4.0%)
Source: Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1 · v2026.1 · Eurocode 3 - UK National Annex · Methodology