Steel Beam Sizes / AISC / Angles / L4x3x1/2
L4x3x1/2 Steel Beam Dimensions and Properties
AISC Angles · v16.0
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
L4x3x1/2 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 | 11.10 lb/ft | 16.40 kg/m |
| Width | 4.00 in | 102.00 mm |
| Height | 3.00 in | 76.20 mm |
| t | 0.500 in | 12.700 mm |
| Area | 3.25 in² | 2,100.00 mm² |
| Ix | 5.02 in⁴ | 2,090,000 mm⁴ |
| Iy | 2.40 in⁴ | 999,000.00 mm⁴ |
| Sx | 1.87 in³ | 30,600.00 mm³ |
| Sy | 1.10 in³ | 18,000.00 mm³ |
| Zx | 3.36 in³ | 55,100.00 mm³ |
| Zy | 1.99 in³ | 32,600.00 mm³ |
| rx | 1.24 in | 31.50 mm |
| ry | 0.86 in | 21.80 mm |
| J | 0.28 in⁴ | 117,000.00 mm⁴ |
| Cw | 0.26 in⁶ | 68,500,000 mm⁶ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus L4x3x1/2.
Lighter in L4
L4x4x3/8
- Weight
- 9.8 lb/ft (-12%)
- Depth
- 4.00 in (+33%)
- Ix
- 4.3 in⁴ (-14%)
Heavier in L4
L4x4x7/16
- Weight
- 11.3 lb/ft (+1.8%)
- Depth
- 4.00 in (+33%)
- Ix
- 4.9 in⁴ (-1.8%)
Closest Iₓ in L4
L4x3-1/2x1/2
- Weight
- 11.9 lb/ft (+7.2%)
- Depth
- 3.50 in (+17%)
- Ix
- 5.3 in⁴ (+5.6%)
Similar weight in L3
L3-1/2x3-1/2x1/2
- Weight
- 11.1 lb/ft (0.0%)
- Depth
- 3.50 in (+17%)
- Ix
- 3.6 in⁴ (-28%)
Source: AISC Shapes Database v16.0 · Methodology