StructureCalcs2L5X3X1/2LLBB
Double Angle · AISC Shapes Database v15.0 · United States
2L5X3X1/2LLBB is a double angle 76 mm deep × 127 mm wide, 12.7 mm thick, weighing 38.1 kg/m. The dimensions below are the published AISC Shapes Database v15.0 values; the drawing is generated from them.
Double angles pair two matching angles back to back — the classic bolted truss chord and web member, tabulated for the pair acting together.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Overall depth, d | 76 mm | 3.00 in |
| Overall width, b | 127 mm | 5.00 in |
| Angle thickness, t | 12.7 mm | 0.500 in |
| Mass per metre | 38.1 kg/m | 25.6 lb/ft |
| Area, A | 4,839 mm² | 7.50 in² |
| Second moment, Ix | 7,866,774 mm⁴ | 18.9 in⁴ |
| Second moment, Iy | 3,845,978 mm⁴ | 9.2 in⁴ |
Derived section properties
Integrated from a square-cornered outline — the fillet radii this family really has are not drawn, so the computed values differ slightly from published. For 2L5X3X1/2LLBB the computed area is better than 0.01% from published and Ix 0.03%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Sx | 95,329 mm³ |
| Elastic modulus, Sy | 51,210 mm³ |
| Plastic modulus, Zx | 168,992 mm³ |
| Plastic modulus, Zy | 92,177 mm³ |
| Radius of gyration, rx | 40.3 mm |
| Radius of gyration, ry | 28.4 mm |
S is the elastic modulus and Z the plastic modulus, following AISC 360. Australian and British practice reverse the letters.
Neighbouring sizes
Where these numbers come from
Published AISC Shapes Database v15.0 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API