AA standard channels

C 12 x 8.27

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 = 4d = 12tf = 0.47tf = 0.47tw = 0.29tw = 0.29
Cross-section, to scaledimensions in inches

Dimensions

Depthd
12in
Flange widthbf
4in
Web thicknesstw
0.29in
Flange thicknesstf
0.47in
Root radiusr
0.4in

Mass and area

Mass per lengthm
8.236lb/ft
Cross-sectional areaA
7.036in²
Published area (standard)A pub.
7.04in²
Outside perimeterP
39.08in

Strong axis x–x

Moment of inertiaIx
159.8in⁴
Elastic section modulusSx
26.63in³
Plastic section modulusZx
30.92in³
Radius of gyrationrx
4.765in

Weak axis y–y

Moment of inertiaIy
11.03in⁴
Elastic section modulusSy
3.856in³
Plastic section modulusZy
6.979in³
Radius of gyrationry
1.252in

Torsion and stability

Torsional constantJ
0.3709in⁴

Centers

Centroidx̄
1.139in

Equivalents in other standards