UB – universal beams

914x305x253

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 = 305.5d = 918.4tf = 27.9tf = 27.9tw = 17.3tw = 17.3
Cross-section, to scaledimensions in mm

Dimensions

Depthd
918.4mm
Flange widthbf
305.5mm
Web thicknesstw
17.3mm
Flange thicknesstf
27.9mm
Root radiusr
19.1mm

Mass and area

Mass per lengthm
253.4kg/m
Cross-sectional areaA
32,283mm²
Outside perimeterP
2,991mm

Strong axis x–x

Moment of inertiaIx
4,36310⁶ mm⁴
Elastic section modulusSx
9,50110³ mm³
Plastic section modulusZx
10,94210³ mm³
Radius of gyrationrx
367.6mm

Weak axis y–y

Moment of inertiaIy
13310⁶ mm⁴
Elastic section modulusSy
870.810³ mm³
Plastic section modulusZy
1,37110³ mm³
Radius of gyrationry
64.19mm

Torsion and stability

Torsional constantJ
6,30510³ mm⁴
Warping constantCw
26,28410⁹ mm⁶

Equivalents in other standards