StructureCalcs250UB37.3
Universal Beam · AS/NZS 3679.1 · Australia / New Zealand
250UB37.3 is a universal beam 256.0 mm deep with a 146.0 mm wide flange, weighing 37.3 kg/m. The dimensions below are the published AS/NZS 3679.1 values; the drawing is generated from them.
Universal Beams are the workhorse flexural members of Australian steel design — parallel-flange I-sections rolled to AS/NZS 3679.1, proportioned deep and narrow for major-axis bending in floors and rafters.
Analyse this section, or combine it with plates and other shapes.
Open 250UB37.3 in the Section CalculatorFree, no sign-up, runs in your browser.
Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 256.0 mm | 10.08 in |
| Flange width, bf | 146.0 mm | 5.75 in |
| Flange thickness, tf | 10.9 mm | 0.429 in |
| Web thickness, tw | 6.4 mm | 0.252 in |
| Mass per metre | 37.3 kg/m | 25.1 lb/ft |
| Area, A | 4,750 mm² | 7.36 in² |
| Second moment, Ix | 55,648,375 mm⁴ | 133.7 in⁴ |
| Second moment, Iy | 5,524,000 mm⁴ | 13.3 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 250UB37.3 the computed area agrees with the published value to better than 0.01% and Ix to 0.11%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 434,255 mm³ |
| Elastic modulus, Zy | 77,546 mm³ |
| Plastic modulus, Sx | 485,639 mm³ |
| Plastic modulus, Sy | 118,923 mm³ |
| Radius of gyration, rx | 108.2 mm |
| Radius of gyration, ry | 34.5 mm |
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