2L4×3×5/16×3/4LLBB double angle
Detailing dimensions and section properties from the AISC Shapes Database, 16th Edition. Values are shown to the nearest 1/16 in. as they appear on a shop drawing.
2L4×3×5/16×3/4LLBB has a 4 in. long leg and a 3 in. short leg, 5/16 in. thick, in contact back to back.
It is a double angle set with its long legs back-to-back.
At 14.4 lb per foot it is one of the 30 2L4×3 sizes, which run from 11.6 to 27.2 lb/ft.
For strong-axis bending its section modulus is Sx = 2.44 in³ and its moment of inertia Ix = 6.72 in⁴, with a plastic modulus Zx = 4.38 in³.
Detailing dimensions
| Long leg | 4" |
|---|---|
| Short leg | 3" |
| Thickness (t) | 5/16" |
Section properties
| Weight | 14.4 lb/ft |
|---|---|
| Area (A) | 4.18 in² |
| Ix | 6.72 in⁴ |
| Sx | 2.44 in³ |
| Zx | 4.38 in³ |
| rx | 1.27 in |
| Iy | 8.55 in⁴ |
| Sy | 2.53 in³ |
| Zy | 4.7 in³ |
| ry | 1.43 in |
Other 2L4×3 sizes
Same nominal size, different weight — useful when you are checking a substitution or a lighter section.
All 2L4×3 sizes and dimensions →
Similar weight double angles
Comparable 14.4 lb/ft sections in other double angle sizes.
Detailing values are rounded to the nearest 1/16 in. per the AISC Steel Construction Manual. Verify critical dimensions against the current Manual before fabrication. Need 2L4×3×5/16×3/4LLBB cut, formed, or fabricated? Huntington Steel & Supply Co.
Browse more: Double angles · Steel Beam Size Chart