UB – universal beams

686x254x170

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 = 255.8d = 692.9tf = 23.7tf = 23.7tw = 14.5tw = 14.5
Cross-section, to scaledimensions in mm

Dimensions

Depthd
692.9mm
Flange widthbf
255.8mm
Web thicknesstw
14.5mm
Flange thicknesstf
23.7mm
Root radiusr
15.2mm

Mass and area

Mass per lengthm
170.2kg/m
Cross-sectional areaA
21,683mm²
Outside perimeterP
2,354mm

Strong axis x–x

Moment of inertiaIx
1,70310⁶ mm⁴
Elastic section modulusSx
4,91610³ mm³
Plastic section modulusZx
5,63110³ mm³
Radius of gyrationrx
280.3mm

Weak axis y–y

Moment of inertiaIy
66.310⁶ mm⁴
Elastic section modulusSy
518.410³ mm³
Plastic section modulusZy
811.410³ mm³
Radius of gyrationry
55.3mm

Torsion and stability

Torsional constantJ
3,09810³ mm⁴
Warping constantCw
7,40210⁹ mm⁶

Equivalents in other standards