UB – universal beams

305x102x28

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 = 101.8d = 308.7tf = 8.8tf = 8.8tw = 6tw = 6
Cross-section, to scaledimensions in mm

Dimensions

Depthd
308.7mm
Flange widthbf
101.8mm
Web thicknesstw
6mm
Flange thicknesstf
8.8mm
Root radiusr
7.6mm

Mass and area

Mass per lengthm
28.16kg/m
Cross-sectional areaA
3,588mm²
Outside perimeterP
999.6mm

Strong axis x–x

Moment of inertiaIx
53.6610⁶ mm⁴
Elastic section modulusSx
347.610³ mm³
Plastic section modulusZx
402.910³ mm³
Radius of gyrationrx
122.3mm

Weak axis y–y

Moment of inertiaIy
1.55410⁶ mm⁴
Elastic section modulusSy
30.5310³ mm³
Plastic section modulusZy
48.4510³ mm³
Radius of gyrationry
20.81mm

Torsion and stability

Torsional constantJ
75.1110³ mm⁴
Warping constantCw
34.7910⁹ mm⁶

Equivalents in other standards