UB – universal beams

305x102x25

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 = 101.6d = 305.1tf = 7tf = 7tw = 5.8tw = 5.8
Cross-section, to scaledimensions in mm

Dimensions

Depthd
305.1mm
Flange widthbf
101.6mm
Web thicknesstw
5.8mm
Flange thicknesstf
7mm
Root radiusr
7.6mm

Mass and area

Mass per lengthm
24.81kg/m
Cross-sectional areaA
3,160mm²
Outside perimeterP
992mm

Strong axis x–x

Moment of inertiaIx
44.5510⁶ mm⁴
Elastic section modulusSx
292.110³ mm³
Plastic section modulusZx
34210³ mm³
Radius of gyrationrx
118.7mm

Weak axis y–y

Moment of inertiaIy
1.22910⁶ mm⁴
Elastic section modulusSy
24.210³ mm³
Plastic section modulusZy
38.8110³ mm³
Radius of gyrationry
19.72mm

Torsion and stability

Torsional constantJ
49.7710³ mm⁴
Warping constantCw
27.1810⁹ mm⁶

Equivalents in other standards