UB – universal beams

686x254x125

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 = 253d = 677.9tf = 16.2tf = 16.2tw = 11.7tw = 11.7
Cross-section, to scaledimensions in mm

Dimensions

Depthd
677.9mm
Flange widthbf
253mm
Web thicknesstw
11.7mm
Flange thicknesstf
16.2mm
Root radiusr
15.2mm

Mass and area

Mass per lengthm
125.2kg/m
Cross-sectional areaA
15,948mm²
Outside perimeterP
2,318mm

Strong axis x–x

Moment of inertiaIx
1,18010⁶ mm⁴
Elastic section modulusSx
3,48110³ mm³
Plastic section modulusZx
3,99410³ mm³
Radius of gyrationrx
272mm

Weak axis y–y

Moment of inertiaIy
43.8310⁶ mm⁴
Elastic section modulusSy
346.510³ mm³
Plastic section modulusZy
542.410³ mm³
Radius of gyrationry
52.42mm

Torsion and stability

Torsional constantJ
1,18310³ mm⁴
Warping constantCw
4,78610⁹ mm⁶

Equivalents in other standards