UB – universal beams

305x102x33

Standard: BS 4-1:2005Source: Primary geometry (h, b, tw, tf, r) — calculated properties (exact engine)
Range derived from BS 4-1; to be confirmed with the SAISC Red Book.
xybf = 102.4d = 312.7tf = 10.8tf = 10.8tw = 6.6tw = 6.6
Cross-section, to scaledimensions in mm

Dimensions

Depthd
312.7mm
Flange widthbf
102.4mm
Web thicknesstw
6.6mm
Flange thicknesstf
10.8mm
Root radiusr
7.6mm

Mass and area

Mass per lengthm
32.83kg/m
Cross-sectional areaA
4,183mm²
Outside perimeterP
1,009mm

Strong axis x–x

Moment of inertiaIx
65.0110⁶ mm⁴
Elastic section modulusSx
415.810³ mm³
Plastic section modulusZx
480.810³ mm³
Radius of gyrationrx
124.7mm

Weak axis y–y

Moment of inertiaIy
1.94110⁶ mm⁴
Elastic section modulusSy
37.9110³ mm³
Plastic section modulusZy
60.0410³ mm³
Radius of gyrationry
21.54mm

Torsion and stability

Torsional constantJ
122.910³ mm⁴
Warping constantCw
44.0410⁹ mm⁶

Equivalents in other standards