UB – universal beams
180UB18.1
Same sections as Australia (joint AS/NZS standard). Published area (Ag) shown as a check: difference < 1.5% on every section.
Dimensions
- Depthd
- 175mm
- Flange widthbf
- 90mm
- Web thicknesstw
- 5mm
- Flange thicknesstf
- 8mm
- Root radiusr
- 8.9mm
Mass and area
- Mass per lengthm
- 18.08kg/m
- Cross-sectional areaA
- 2,303mm²
- Published area (standard)A pub.
- 2,300mm²
- Outside perimeterP
- 684.7mm
Strong axis x–x
- Moment of inertiaIx
- 12.1310⁶ mm⁴
- Elastic section modulusSx
- 138.610³ mm³
- Plastic section modulusZx
- 157.110³ mm³
- Radius of gyrationrx
- 72.58mm
Weak axis y–y
- Moment of inertiaIy
- 0.975210⁶ mm⁴
- Elastic section modulusSy
- 21.6710³ mm³
- Plastic section modulusZy
- 33.710³ mm³
- Radius of gyrationry
- 20.58mm
Torsion and stability
- Torsional constantJ
- 44.8810³ mm⁴
- Warping constantCw
- 6.77710⁹ mm⁶