StructureCalcs100 x 75 x 8 UA
Unequal Angle · AS/NZS 3679.1 · Australia / New Zealand
100 x 75 x 8 UA is an unequal angle with 100 × 75 mm legs, 7.8 mm thick, weighing 10.3 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 | 100 mm | 3.94 in |
| Second leg, b | 75 mm | 2.95 in |
| Thickness, t | 7.8 mm | 0.307 in |
| Mass per metre | 10.3 kg/m | 6.9 lb/ft |
| Area, A | 1,310 mm² | 2.03 in² |
| Second moment, Ix | 1,300,000 mm⁴ | 3.1 in⁴ |
| Second moment, Iy | 627,000 mm⁴ | 1.5 in⁴ |
| Principal maximum, Imax | 1,590,000 mm⁴ | 3.8 in⁴ |
| Principal minimum, Imin | 337,000 mm⁴ | 0.8 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 100 x 75 x 8 UA the computed area agrees with the published value to 0.22% and Ix to 0.18%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 18,824 mm³ |
| Elastic modulus, Zy | 11,122 mm³ |
| Plastic modulus, Sx | 34,451 mm³ |
| Plastic modulus, Sy | 20,166 mm³ |
| Radius of gyration, rx | 31.5 mm |
| Radius of gyration, ry | 21.9 mm |
| Principal maximum, Imax (derived) | 1,587,198 mm⁴ |
| Principal minimum, Imin (derived) | 336,608 mm⁴ |
| Principal axis angle, θp | 28.8° |
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