UB – universal beams

406x178x85

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 = 181.9d = 417.2tf = 18.2tf = 18.2tw = 10.9tw = 10.9
Cross-section, to scaledimensions in mm

Dimensions

Depthd
417.2mm
Flange widthbf
181.9mm
Web thicknesstw
10.9mm
Flange thicknesstf
18.2mm
Root radiusr
10.2mm

Mass and area

Mass per lengthm
85.26kg/m
Cross-sectional areaA
10,861mm²
Outside perimeterP
1,523mm

Strong axis x–x

Moment of inertiaIx
31710⁶ mm⁴
Elastic section modulusSx
1,52010³ mm³
Plastic section modulusZx
1,73310³ mm³
Radius of gyrationrx
170.8mm

Weak axis y–y

Moment of inertiaIy
18.310⁶ mm⁴
Elastic section modulusSy
201.210³ mm³
Plastic section modulusZy
313.110³ mm³
Radius of gyrationry
41.05mm

Torsion and stability

Torsional constantJ
936.810³ mm⁴
Warping constantCw
726.610⁹ mm⁶

Equivalents in other standards