StructureCalcs75 x 50 x 8 UA
Unequal Angle · AS/NZS 3679.1 · Australia / New Zealand
75 x 50 x 8 UA is an unequal angle with 75 × 50 mm legs, 7.8 mm thick, weighing 7.2 kg/m. The dimensions below are the published AS/NZS 3679.1 values; the drawing is generated from them.
Unequal Angles put the longer leg where connection or stiffness demands it; like every angle they buckle about tilted principal axes, and the principal pair is published here.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Leg length, d | 75 mm | 2.95 in |
| Second leg, b | 50 mm | 1.97 in |
| Thickness, t | 7.8 mm | 0.307 in |
| Mass per metre | 7.2 kg/m | 4.9 lb/ft |
| Area, A | 921 mm² | 1.43 in² |
| Second moment, Ix | 511,000 mm⁴ | 1.2 in⁴ |
| Second moment, Iy | 181,000 mm⁴ | 0.4 in⁴ |
| Principal maximum, Imax | 586,000 mm⁴ | 1.4 in⁴ |
| Principal minimum, Imin | 106,000 mm⁴ | 0.3 in⁴ |
Derived section properties
Integrated from the section's own outline including the root and toe radii, whose arcs are integrated analytically rather than approximated by facets. For 75 x 50 x 8 UA the computed area agrees with the published value to 0.02% and Ix to 0.02%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 10,253 mm³ |
| Elastic modulus, Zy | 4,865 mm³ |
| Plastic modulus, Sx | 18,497 mm³ |
| Plastic modulus, Sy | 8,957 mm³ |
| Radius of gyration, rx | 23.6 mm |
| Radius of gyration, ry | 14.0 mm |
| Principal maximum, Imax (derived) | 586,259 mm⁴ |
| Principal minimum, Imin (derived) | 105,805 mm⁴ |
| Principal axis angle, θp | 23.3° |
Z is the elastic modulus and S the plastic modulus, following AS 4100. Under AISC 360 the letters are reversed.
Neighbouring sizes
Where these numbers come from
Published AS/NZS 3679.1 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API