AA standard I-beams

I 3 x 1.64

Standard: Aluminum AssociationSource: Aluminum Association standard shape dimensions (as listed by Engineers Edge) — calculated properties
Mass calculated at 2700 kg/m³. Flange toe radius ignored (area difference < 1.5%).
xybf = 2.5d = 3tf = 0.2tf = 0.2tw = 0.13tw = 0.13
Cross-section, to scaledimensions in inches

Dimensions

Depthd
3in
Flange widthbf
2.5in
Web thicknesstw
0.13in
Flange thicknesstf
0.2in
Root radiusr
0.25in

Mass and area

Mass per lengthm
1.629lb/ft
Cross-sectional areaA
1.392in²
Published area (standard)A pub.
1.392in²
Outside perimeterP
15.31in

Strong axis x–x

Moment of inertiaIx
2.237in⁴
Elastic section modulusSx
1.491in³
Plastic section modulusZx
1.686in³
Radius of gyrationrx
1.268in

Weak axis y–y

Moment of inertiaIy
0.5222in⁴
Elastic section modulusSy
0.4178in³
Plastic section modulusZy
0.6425in³
Radius of gyrationry
0.6126in

Torsion and stability

Torsional constantJ
0.01935in⁴
Warping constantCw
1.021in⁶

Equivalents in other standards