AA standard channels

C 4 x 2.33

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 = 2.25d = 4tf = 0.29tf = 0.29tw = 0.19tw = 0.19
Cross-section, to scaledimensions in inches

Dimensions

Depthd
4in
Flange widthbf
2.25in
Web thicknesstw
0.19in
Flange thicknesstf
0.29in
Root radiusr
0.25in

Mass and area

Mass per lengthm
2.32lb/ft
Cross-sectional areaA
1.982in²
Published area (standard)A pub.
1.98in²
Outside perimeterP
16.41in

Strong axis x–x

Moment of inertiaIx
5.207in⁴
Elastic section modulusSx
2.603in³
Plastic section modulusZx
3.021in³
Radius of gyrationrx
1.621in

Weak axis y–y

Moment of inertiaIy
1.02in⁴
Elastic section modulusSy
0.692in³
Plastic section modulusZy
1.23in³
Radius of gyrationry
0.7176in

Torsion and stability

Torsional constantJ
0.0454in⁴

Centers

Centroidx̄
0.7754in

Equivalents in other standards