AA standard channels

C 4 x 1.74

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 = 2d = 4tf = 0.23tf = 0.23tw = 0.15tw = 0.15
Cross-section, to scaledimensions in inches

Dimensions

Depthd
4in
Flange widthbf
2in
Web thicknesstw
0.15in
Flange thicknesstf
0.23in
Root radiusr
0.25in

Mass and area

Mass per lengthm
1.73lb/ft
Cross-sectional areaA
1.478in²
Published area (standard)A pub.
1.48in²
Outside perimeterP
15.49in

Strong axis x–x

Moment of inertiaIx
3.906in⁴
Elastic section modulusSx
1.953in³
Plastic section modulusZx
2.25in³
Radius of gyrationrx
1.626in

Weak axis y–y

Moment of inertiaIy
0.6013in⁴
Elastic section modulusSy
0.4464in³
Plastic section modulusZy
0.8034in³
Radius of gyrationry
0.6379in

Torsion and stability

Torsional constantJ
0.0213in⁴

Centers

Centroidx̄
0.6532in

Equivalents in other standards