UB – universal beams
250UB25.7
Same sections as Australia (joint AS/NZS standard). Published area (Ag) shown as a check: difference < 1.5% on every section.
Dimensions
- Depthd
- 248mm
- Flange widthbf
- 124mm
- Web thicknesstw
- 5mm
- Flange thicknesstf
- 8mm
- Root radiusr
- 12mm
Mass and area
- Mass per lengthm
- 25.65kg/m
- Cross-sectional areaA
- 3,268mm²
- Published area (standard)A pub.
- 3,270mm²
- Outside perimeterP
- 961.4mm
Strong axis x–x
- Moment of inertiaIx
- 35.3710⁶ mm⁴
- Elastic section modulusSx
- 285.310³ mm³
- Plastic section modulusZx
- 319.410³ mm³
- Radius of gyrationrx
- 104mm
Weak axis y–y
- Moment of inertiaIy
- 2.54910⁶ mm⁴
- Elastic section modulusSy
- 41.1110³ mm³
- Plastic section modulusZy
- 63.5910³ mm³
- Radius of gyrationry
- 27.93mm
Torsion and stability
- Torsional constantJ
- 66.8910³ mm⁴
- Warping constantCw
- 36.6110⁹ mm⁶