Steel Beam Sizes / AISC / Angles / L8x4x3/4
L8x4x3/4 Steel Beam Dimensions and Properties
AISC Angles · v16.0
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
L8x4x3/4 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 | 28.70 lb/ft | 42.50 kg/m |
| Width | 8.00 in | 203.00 mm |
| Height | 4.00 in | 102.00 mm |
| t | 0.750 in | 19.100 mm |
| Area | 8.49 in² | 5,480.00 mm² |
| Ix | 55.00 in⁴ | 22,900,000 mm⁴ |
| Iy | 9.37 in⁴ | 3,900,000 mm⁴ |
| Sx | 10.90 in³ | 179,000.00 mm³ |
| Sy | 3.07 in³ | 50,300.00 mm³ |
| Zx | 18.90 in³ | 310,000.00 mm³ |
| Zy | 5.82 in³ | 95,400.00 mm³ |
| rx | 2.55 in | 64.80 mm |
| ry | 1.05 in | 26.70 mm |
| J | 1.61 in⁴ | 670,000.00 mm⁴ |
| Cw | 5.75 in⁶ | 1,540,000,000 mm⁶ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus L8x4x3/4.
Lighter in L8
L8x6x5/8
- Weight
- 28.5 lb/ft (-0.7%)
- Depth
- 6.00 in (+50%)
- Ix
- 54.2 in⁴ (-1.5%)
Heavier in L8
L8x8x9/16
- Weight
- 29.6 lb/ft (+3.1%)
- Depth
- 8.00 in (+100%)
- Ix
- 54.2 in⁴ (-1.5%)
Closest Iₓ in L8
L8x8x5/8
- Weight
- 32.7 lb/ft (+14%)
- Depth
- 8.00 in (+100%)
- Ix
- 59.6 in⁴ (+8.4%)
Similar weight in L7
L7x4x3/4
- Weight
- 26.2 lb/ft (-8.7%)
- Depth
- 4.00 in (0.0%)
- Ix
- 37.8 in⁴ (-31%)
Source: AISC Shapes Database v16.0 · Methodology