AA standard I-beams

I 12 x 11.7

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 = 7d = 12tf = 0.47tf = 0.47tw = 0.29tw = 0.29
Cross-section, to scaledimensions in inches

Dimensions

Depthd
12in
Flange widthbf
7in
Web thicknesstw
0.29in
Flange thicknesstf
0.47in
Root radiusr
0.4in

Mass and area

Mass per lengthm
11.62lb/ft
Cross-sectional areaA
9.925in²
Published area (standard)A pub.
9.925in²
Outside perimeterP
50.73in

Strong axis x–x

Moment of inertiaIx
255.6in⁴
Elastic section modulusSx
42.6in³
Plastic section modulusZx
47.55in³
Radius of gyrationrx
5.075in

Weak axis y–y

Moment of inertiaIy
26.9in⁴
Elastic section modulusSy
7.685in³
Plastic section modulusZy
11.78in³
Radius of gyrationry
1.646in

Torsion and stability

Torsional constantJ
0.6236in⁴
Warping constantCw
893in⁶

Equivalents in other standards