UB – universal beams

1016x305x438

Standard: BS 4-1:2005Source: Primary geometry (h, b, tw, tf, r) — calculated properties (exact engine)
Singapore uses BS / BS EN sections; same data as the United Kingdom.
xybf = 305d = 1,026tf = 49tf = 49tw = 26.9tw = 26.9
Cross-section, to scaledimensions in mm

Dimensions

Depthd
1,026mm
Flange widthbf
305mm
Web thicknesstw
26.9mm
Flange thicknesstf
49mm
Root radiusr
30mm

Mass and area

Mass per lengthm
436.7kg/m
Cross-sectional areaA
55,626mm²
Outside perimeterP
3,167mm

Strong axis x–x

Moment of inertiaIx
9,09210⁶ mm⁴
Elastic section modulusSx
17,72310³ mm³
Plastic section modulusZx
20,74610³ mm³
Radius of gyrationrx
404.3mm

Weak axis y–y

Moment of inertiaIy
233.610⁶ mm⁴
Elastic section modulusSy
1,53210³ mm³
Plastic section modulusZy
2,46310³ mm³
Radius of gyrationry
64.8mm

Torsion and stability

Torsional constantJ
31,90210³ mm⁴
Warping constantCw
55,29310⁹ mm⁶

Equivalents in other standards