UB – universal beams

250UB31.4

Standard: AS/NZS 3679.1Source: InfraBuild dimensions, Hot Rolled & Structural Steel Products (ed. 9) — calculated properties
Published area (Ag) shown as a check: difference < 1.5% on every section.
xybf = 146d = 251.6tf = 8.6tf = 8.6tw = 6.1tw = 6.1
Cross-section, to scaledimensions in mm

Dimensions

Depthd
251.6mm
Flange widthbf
146mm
Web thicknesstw
6.1mm
Flange thicknesstf
8.6mm
Root radiusr
8.9mm

Mass and area

Mass per lengthm
31.47kg/m
Cross-sectional areaA
4,009mm²
Published area (standard)A pub.
4,010mm²
Outside perimeterP
1,060mm

Strong axis x–x

Moment of inertiaIx
44.5410⁶ mm⁴
Elastic section modulusSx
35410³ mm³
Plastic section modulusZx
396.710³ mm³
Radius of gyrationrx
105.4mm

Weak axis y–y

Moment of inertiaIy
4.46710⁶ mm⁴
Elastic section modulusSy
61.1910³ mm³
Plastic section modulusZy
94.1810³ mm³
Radius of gyrationry
33.38mm

Torsion and stability

Torsional constantJ
90.9210³ mm⁴
Warping constantCw
65.8510⁹ mm⁶

Equivalents in other standards