StructureCalcsL8X4X3/4
Angle · AISC Shapes Database v15.0 · United States
L8X4X3/4 is a single angle with 203 × 102 mm legs, 19.1 mm thick, weighing 42.7 kg/m. The dimensions below are the published AISC Shapes Database v15.0 values; the drawing is generated from them.
Single angles serve as braces, cleats and connection material. An angle bends about tilted principal axes, so the derived principal values below carry their angle.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Leg length, d | 203 mm | 8.00 in |
| Second leg, b | 102 mm | 4.00 in |
| Thickness, t | 19.1 mm | 0.750 in |
| Mass per metre | 42.7 kg/m | 28.7 lb/ft |
| Area, A | 5,477 mm² | 8.49 in² |
| Second moment, Ix | 22,892,728 mm⁴ | 55.0 in⁴ |
| Second moment, Iy | 3,900,089 mm⁴ | 9.4 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 L8X4X3/4 the computed area is 0.62% from published and Ix 0.20%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Sx | 178,218 mm³ |
| Elastic modulus, Sy | 50,336 mm³ |
| Plastic modulus, Zx | 308,986 mm³ |
| Plastic modulus, Zy | 95,280 mm³ |
| Radius of gyration, rx | 64.8 mm |
| Radius of gyration, ry | 26.8 mm |
| Principal maximum, Imax (derived) | 24,195,309 mm⁴ |
| Principal minimum, Imin (derived) | 2,548,156 mm⁴ |
| Principal axis angle, θp | 14.4° |
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