AA standard I-beams

I 9 x 8.36

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 = 5.5d = 9tf = 0.44tf = 0.44tw = 0.27tw = 0.27
Cross-section, to scaledimensions in inches

Dimensions

Depthd
9in
Flange widthbf
5.5in
Web thicknesstw
0.27in
Flange thicknesstf
0.44in
Root radiusr
0.3in

Mass and area

Mass per lengthm
8.322lb/ft
Cross-sectional areaA
7.11in²
Published area (standard)A pub.
7.11in²
Outside perimeterP
38.94in

Strong axis x–x

Moment of inertiaIx
102in⁴
Elastic section modulusSx
22.67in³
Plastic section modulusZx
25.47in³
Radius of gyrationrx
3.788in

Weak axis y–y

Moment of inertiaIy
12.22in⁴
Elastic section modulusSy
4.443in³
Plastic section modulusZy
6.819in³
Radius of gyrationry
1.311in

Torsion and stability

Torsional constantJ
0.389in⁴
Warping constantCw
223.5in⁶

Equivalents in other standards