UB – universal beams

686x254x152

Standard: BS 4-1:2005Source: Primary geometry (h, b, tw, tf, r) — calculated properties (exact engine)
xybf = 254.5d = 687.5tf = 21tf = 21tw = 13.2tw = 13.2
Cross-section, to scaledimensions in mm

Dimensions

Depthd
687.5mm
Flange widthbf
254.5mm
Web thicknesstw
13.2mm
Flange thicknesstf
21mm
Root radiusr
15.2mm

Mass and area

Mass per lengthm
152.4kg/m
Cross-sectional areaA
19,408mm²
Outside perimeterP
2,341mm

Strong axis x–x

Moment of inertiaIx
1,50410⁶ mm⁴
Elastic section modulusSx
4,37410³ mm³
Plastic section modulusZx
5,00010³ mm³
Radius of gyrationrx
278.3mm

Weak axis y–y

Moment of inertiaIy
57.8410⁶ mm⁴
Elastic section modulusSy
454.510³ mm³
Plastic section modulusZy
710.210³ mm³
Radius of gyrationry
54.59mm

Torsion and stability

Torsional constantJ
2,21310³ mm⁴
Warping constantCw
6,40710⁹ mm⁶

Equivalents in other standards