StructureCalcs200 x 200 x 18 EA
Equal Angle · AS/NZS 3679.1 · Australia / New Zealand
200 x 200 x 18 EA is an equal angle with 200 × 200 mm legs, 18.0 mm thick, weighing 54.4 kg/m. The dimensions below are the published AS/NZS 3679.1 values; the drawing is generated from them.
Equal Angles serve as bracing, cleats and lintels. An unrestrained angle bends about its tilted principal axes, so the published Imin — not Ix — governs its buckling checks.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Leg length, d | 200 mm | 7.87 in |
| Thickness, t | 18.0 mm | 0.709 in |
| Mass per metre | 54.4 kg/m | 36.6 lb/ft |
| Area, A | 6,930 mm² | 10.74 in² |
| Second moment, Ix | 26,250,000 mm⁴ | 63.1 in⁴ |
| Second moment, Iy | 26,250,000 mm⁴ | 63.1 in⁴ |
| Principal maximum, Imax | 41,700,000 mm⁴ | 100.2 in⁴ |
| Principal minimum, Imin | 10,800,000 mm⁴ | 25.9 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 200 x 200 x 18 EA the computed area agrees with the published value to 0.07% and Ix to 0.03%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 182,621 mm³ |
| Elastic modulus, Zy | 182,621 mm³ |
| Plastic modulus, Sx | 329,737 mm³ |
| Plastic modulus, Sy | 329,737 mm³ |
| Radius of gyration, rx | 61.5 mm |
| Radius of gyration, ry | 61.5 mm |
| Principal maximum, Imax (derived) | 41,723,583 mm⁴ |
| Principal minimum, Imin (derived) | 10,791,879 mm⁴ |
| Principal axis angle, θp | 45.0° |
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