Steel Beam Sizes / AISC / Double Angles / 2L7x4x3/4x3/4LLBB
2L7x4x3/4x3/4LLBB Steel Beam Dimensions and Properties
AISC Double angles · v16.0
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
2L7x4x3/4x3/4LLBB 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 | 52.40 lb/ft | 77.60 kg/m |
| Width | 4.00 in | 102.00 mm |
| Height | 7.00 in | 178.00 mm |
| t | 0.750 in | 19.100 mm |
| Area | 15.50 in² | 10,000.00 mm² |
| Ix | 75.60 in⁴ | 31,500,000 mm⁴ |
| Sx | 16.80 in³ | 275,000.00 mm³ |
| rx | 2.21 in | 56.10 mm |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus 2L7x4x3/4x3/4LLBB.
Lighter in Double angles
2L8x6x9/16LLBB
- Weight
- 51.4 lb/ft (-1.9%)
- Depth
- 8.00 in (+14%)
- Ix
- 98.8 in⁴ (+31%)
Heavier in Double angles
2L8x8x1/2
- Weight
- 52.8 lb/ft (+0.8%)
- Depth
- 8.00 in (+14%)
- Ix
- 97.6 in⁴ (+29%)
Closest Iₓ in Double angles
2L7x4x3/4LLBB
- Weight
- 52.4 lb/ft (0.0%)
- Depth
- 7.00 in (0.0%)
- Ix
- 75.6 in⁴ (0.0%)
Source: AISC Shapes Database v16.0 · Methodology