UB – universal beams

305x127x42

Standard: BS 4-1:2005Source: Primary geometry (h, b, tw, tf, r) — calculated properties (exact engine)
xybf = 124.3d = 307.2tf = 12.1tf = 12.1tw = 8tw = 8
Cross-section, to scaledimensions in mm

Dimensions

Depthd
307.2mm
Flange widthbf
124.3mm
Web thicknesstw
8mm
Flange thicknesstf
12.1mm
Root radiusr
8.9mm

Mass and area

Mass per lengthm
41.92kg/m
Cross-sectional areaA
5,340mm²
Outside perimeterP
1,080mm

Strong axis x–x

Moment of inertiaIx
81.9610⁶ mm⁴
Elastic section modulusSx
533.610³ mm³
Plastic section modulusZx
613.510³ mm³
Radius of gyrationrx
123.9mm

Weak axis y–y

Moment of inertiaIy
3.88810⁶ mm⁴
Elastic section modulusSy
62.5510³ mm³
Plastic section modulusZy
98.4110³ mm³
Radius of gyrationry
26.98mm

Torsion and stability

Torsional constantJ
214.210³ mm⁴
Warping constantCw
84.3210⁹ mm⁶

Equivalents in other standards