UB – universal beams

254x146x31

Standard: BS 4-1:2005Source: Primary geometry (h, b, tw, tf, r) — calculated properties (exact engine)
Singapore uses BS / BS EN sections; same data as the United Kingdom.
xybf = 146.1d = 251.4tf = 8.6tf = 8.6tw = 6tw = 6
Cross-section, to scaledimensions in mm

Dimensions

Depthd
251.4mm
Flange widthbf
146.1mm
Web thicknesstw
6mm
Flange thicknesstf
8.6mm
Root radiusr
7.6mm

Mass and area

Mass per lengthm
31.15kg/m
Cross-sectional areaA
3,968mm²
Outside perimeterP
1,062mm

Strong axis x–x

Moment of inertiaIx
44.1310⁶ mm⁴
Elastic section modulusSx
351.110³ mm³
Plastic section modulusZx
393.110³ mm³
Radius of gyrationrx
105.5mm

Weak axis y–y

Moment of inertiaIy
4.47510⁶ mm⁴
Elastic section modulusSy
61.2610³ mm³
Plastic section modulusZy
94.1310³ mm³
Radius of gyrationry
33.58mm

Torsion and stability

Torsional constantJ
86.7710³ mm⁴
Warping constantCw
65.8810⁹ mm⁶

Equivalents in other standards