UB – universal beams

686x254x140

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 = 253.7d = 683.5tf = 19tf = 19tw = 12.4tw = 12.4
Cross-section, to scaledimensions in mm

Dimensions

Depthd
683.5mm
Flange widthbf
253.7mm
Web thicknesstw
12.4mm
Flange thicknesstf
19mm
Root radiusr
15.2mm

Mass and area

Mass per lengthm
140.1kg/m
Cross-sectional areaA
17,843mm²
Outside perimeterP
2,331mm

Strong axis x–x

Moment of inertiaIx
1,36310⁶ mm⁴
Elastic section modulusSx
3,98710³ mm³
Plastic section modulusZx
4,55810³ mm³
Radius of gyrationrx
276.4mm

Weak axis y–y

Moment of inertiaIy
51.8310⁶ mm⁴
Elastic section modulusSy
408.610³ mm³
Plastic section modulusZy
638.210³ mm³
Radius of gyrationry
53.9mm

Torsion and stability

Torsional constantJ
1,70310³ mm⁴
Warping constantCw
5,70810⁹ mm⁶

Equivalents in other standards