Steel Beam Sizes / UK / Angles / L 120×80×8
L 120×80×8 Steel Beam Dimensions and Properties
UK Angles · v2023.11
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
L 120×80×8 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 | 8.20 lb/ft | 12.20 kg/m |
| Width | 3.15 in | 80.00 mm |
| Height | 4.72 in | 120.00 mm |
| t | 0.315 in | 8.000 mm |
| Area | 2.40 in² | 1,550.00 mm² |
| Ix | 5.43 in⁴ | 2,260,000 mm⁴ |
| Iy | 1.94 in⁴ | 808,000.00 mm⁴ |
| Sx | 1.68 in³ | 27,600.00 mm³ |
| Sy | 0.81 in³ | 13,200.00 mm³ |
| rx | 1.50 in | 38.20 mm |
| ry | 0.90 in | 22.80 mm |
| J | 0.09 in⁴ | 36,200.00 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus L 120×80×8.
Lighter in Angles
L 80×80×10
- Weight
- 11.9 kg/m (-2.5%)
- Depth
- 80.0 mm (-33%)
- Ix
- 875,000 mm⁴ (-61%)
Heavier in Angles
L 100×65×10
- Weight
- 12.3 kg/m (+0.8%)
- Depth
- 100.0 mm (-17%)
- Ix
- 1,540,000 mm⁴ (-32%)
Closest Iₓ in Angles
L 120×120×7
- Weight
- 12.9 kg/m (+5.7%)
- Depth
- 120.0 mm (0.0%)
- Ix
- 2,260,000 mm⁴ (0.0%)
Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Eurocode 3 - UK National Annex · Methodology