UB – universal beams

406x178x54

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 = 177.7d = 402.6tf = 10.9tf = 10.9tw = 7.7tw = 7.7
Cross-section, to scaledimensions in mm

Dimensions

Depthd
402.6mm
Flange widthbf
177.7mm
Web thicknesstw
7.7mm
Flange thicknesstf
10.9mm
Root radiusr
10.2mm

Mass and area

Mass per lengthm
54.13kg/m
Cross-sectional areaA
6,895mm²
Outside perimeterP
1,483mm

Strong axis x–x

Moment of inertiaIx
187.210⁶ mm⁴
Elastic section modulusSx
930.110³ mm³
Plastic section modulusZx
1,05510³ mm³
Radius of gyrationrx
164.8mm

Weak axis y–y

Moment of inertiaIy
10.2110⁶ mm⁴
Elastic section modulusSy
114.910³ mm³
Plastic section modulusZy
178.310³ mm³
Radius of gyrationry
38.48mm

Torsion and stability

Torsional constantJ
23510³ mm⁴
Warping constantCw
39110⁹ mm⁶

Equivalents in other standards