180UB18.1
Universal Beam · AS/NZS 3679.1 · Australia / New Zealand
180UB18.1 is a universal beam 175.0 mm deep with a 90.0 mm flange, weighing 18.1 kg/m. The dimensions below are the published AS/NZS 3679.1 values; the drawing is generated from them.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 175.0 mm | 6.89 in |
| Flange width, bf | 90.0 mm | 3.54 in |
| Flange thickness, tf | 8.0 mm | 0.315 in |
| Web thickness, tw | 5.0 mm | 0.197 in |
| Mass per metre | 18.1 kg/m | 12.1 lb/ft |
| Area, A | 2,303 mm² | 3.57 in² |
| Second moment, Ix | 12,174,682 mm⁴ | 29.2 in⁴ |
| Second moment, Iy | 975,000 mm⁴ | 2.3 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 180UB18.1 the computed area agrees with the published value to better than 0.01% and Ix to 0.36%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 138,643 mm³ |
| Elastic modulus, Zy | 21,671 mm³ |
| Plastic modulus, Sx | 157,112 mm³ |
| Plastic modulus, Sy | 33,699 mm³ |
| Radius of gyration, rx | 72.6 mm |
| Radius of gyration, ry | 20.6 mm |
Z is the elastic modulus and S the plastic modulus, following AS 4100. Under AISC 360 the letters are reversed — S is elastic and Z is plastic.
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