UB – universal beams

356x171x45

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 = 171.1d = 351.4tf = 9.7tf = 9.7tw = 7tw = 7
Cross-section, to scaledimensions in mm

Dimensions

Depthd
351.4mm
Flange widthbf
171.1mm
Web thicknesstw
7mm
Flange thicknesstf
9.7mm
Root radiusr
10.2mm

Mass and area

Mass per lengthm
45kg/m
Cross-sectional areaA
5,733mm²
Outside perimeterP
1,356mm

Strong axis x–x

Moment of inertiaIx
120.710⁶ mm⁴
Elastic section modulusSx
686.710³ mm³
Plastic section modulusZx
774.610³ mm³
Radius of gyrationrx
145.1mm

Weak axis y–y

Moment of inertiaIy
8.11110⁶ mm⁴
Elastic section modulusSy
94.8110³ mm³
Plastic section modulusZy
146.610³ mm³
Radius of gyrationry
37.61mm

Torsion and stability

Torsional constantJ
161.610³ mm⁴
Warping constantCw
236.410⁹ mm⁶

Equivalents in other standards