UB – universal beams

254x146x43

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 = 147.3d = 259.6tf = 12.7tf = 12.7tw = 7.2tw = 7.2
Cross-section, to scaledimensions in mm

Dimensions

Depthd
259.6mm
Flange widthbf
147.3mm
Web thicknesstw
7.2mm
Flange thicknesstf
12.7mm
Root radiusr
7.6mm

Mass and area

Mass per lengthm
43kg/m
Cross-sectional areaA
5,477mm²
Outside perimeterP
1,081mm

Strong axis x–x

Moment of inertiaIx
65.4410⁶ mm⁴
Elastic section modulusSx
504.110³ mm³
Plastic section modulusZx
566.310³ mm³
Radius of gyrationrx
109.3mm

Weak axis y–y

Moment of inertiaIy
6.77410⁶ mm⁴
Elastic section modulusSy
91.9710³ mm³
Plastic section modulusZy
141.110³ mm³
Radius of gyrationry
35.17mm

Torsion and stability

Torsional constantJ
239.710³ mm⁴
Warping constantCw
103.110⁹ mm⁶

Equivalents in other standards