UB – universal beams

254x146x37

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 = 146.4d = 256tf = 10.9tf = 10.9tw = 6.3tw = 6.3
Cross-section, to scaledimensions in mm

Dimensions

Depthd
256mm
Flange widthbf
146.4mm
Web thicknesstw
6.3mm
Flange thicknesstf
10.9mm
Root radiusr
7.6mm

Mass and area

Mass per lengthm
37.03kg/m
Cross-sectional areaA
4,717mm²
Outside perimeterP
1,072mm

Strong axis x–x

Moment of inertiaIx
55.3710⁶ mm⁴
Elastic section modulusSx
432.610³ mm³
Plastic section modulusZx
483.210³ mm³
Radius of gyrationrx
108.3mm

Weak axis y–y

Moment of inertiaIy
5.70610⁶ mm⁴
Elastic section modulusSy
77.9610³ mm³
Plastic section modulusZy
119.410³ mm³
Radius of gyrationry
34.78mm

Torsion and stability

Torsional constantJ
153.710³ mm⁴
Warping constantCw
85.6110⁹ mm⁶

Equivalents in other standards