AA standard channels

C 12 x 11.8

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 = 5d = 12tf = 0.62tf = 0.62tw = 0.35tw = 0.35
Cross-section, to scaledimensions in inches

Dimensions

Depthd
12in
Flange widthbf
5in
Web thicknesstw
0.35in
Flange thicknesstf
0.62in
Root radiusr
0.45in

Mass and area

Mass per lengthm
11.77lb/ft
Cross-sectional areaA
10.05in²
Published area (standard)A pub.
10.1in²
Outside perimeterP
42.91in

Strong axis x–x

Moment of inertiaIx
239.7in⁴
Elastic section modulusSx
39.95in³
Plastic section modulusZx
45.87in³
Radius of gyrationrx
4.883in

Weak axis y–y

Moment of inertiaIy
25.74in⁴
Elastic section modulusSy
7.595in³
Plastic section modulusZy
13.69in³
Radius of gyrationry
1.6in

Torsion and stability

Torsional constantJ
0.9378in⁴

Centers

Centroidx̄
1.611in

Equivalents in other standards