AA standard channels

C 7 x 4.72

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 = 3.5d = 7tf = 0.38tf = 0.38tw = 0.21tw = 0.21
Cross-section, to scaledimensions in inches

Dimensions

Depthd
7in
Flange widthbf
3.5in
Web thicknesstw
0.21in
Flange thicknesstf
0.38in
Root radiusr
0.3in

Mass and area

Mass per lengthm
4.693lb/ft
Cross-sectional areaA
4.009in²
Published area (standard)A pub.
4.01in²
Outside perimeterP
27.32in

Strong axis x–x

Moment of inertiaIx
33.79in⁴
Elastic section modulusSx
9.654in³
Plastic section modulusZx
10.97in³
Radius of gyrationrx
2.903in

Weak axis y–y

Moment of inertiaIy
5.129in⁴
Elastic section modulusSy
2.228in³
Plastic section modulusZy
3.941in³
Radius of gyrationry
1.131in

Torsion and stability

Torsional constantJ
0.1466in⁴

Centers

Centroidx̄
1.198in

Equivalents in other standards