2L5×3×5/16LLBB 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.
2L5×3×5/16LLBB has a 5 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 16.4 lb per foot it is one of the 30 2L5×3 sizes, which run from 13.2 to 25.6 lb/ft.
For strong-axis bending its section modulus is Sx = 3.74 in³ and its moment of inertia Ix = 12.5 in⁴, with a plastic modulus Zx = 6.64 in³.
Detailing dimensions
| Long leg | 5" |
|---|---|
| Short leg | 3" |
| Thickness (t) | 5/16" |
Section properties
| Weight | 16.4 lb/ft |
|---|---|
| Area (A) | 4.82 in² |
| Ix | 12.5 in⁴ |
| Sx | 3.74 in³ |
| Zx | 6.64 in³ |
| rx | 1.61 in |
| Iy | 5.62 in⁴ |
| Sy | 1.87 in³ |
| Zy | 3.24 in³ |
| ry | 1.08 in |
Other 2L5×3 sizes
Same nominal size, different weight — useful when you are checking a substitution or a lighter section.
All 2L5×3 sizes and dimensions →
Similar weight double angles
Comparable 16.4 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 2L5×3×5/16LLBB cut, formed, or fabricated? Huntington Steel & Supply Co.
Browse more: Double angles · Steel Beam Size Chart