C shapes (standard channels)

C9X20 C230X30

Standard: AISC Shapes Database v16.0Source: AISC (aisc.org) — Shapes Database v16.0 (Excel file)
Values published by AISC, in US customary (original) and SI units.
xybf = 2.65d = 9tf = 0.413tf = 0.413tw = 0.448tw = 0.448
Cross-section, to scaledimensions in inches

Dimensions

Depthd
9in
Flange widthbf
2.65in
Web thicknesstw
0.448in
Flange thicknesstf
0.413in
Distance k (design)kdes
1in
Distance k (detailing)kdet
1in
Web clear depthT
7in
Distance between flange centroidsho
8.59in

Mass and area

Mass per lengthm
20lb/ft
Cross-sectional areaA
5.87in²

Strong axis x–x

Moment of inertiaIx
60.9in⁴
Elastic section modulusSx
13.5in³
Plastic section modulusZx
16.9in³
Radius of gyrationrx
3.22in

Weak axis y–y

Moment of inertiaIy
2.41in⁴
Elastic section modulusSy
1.17in³
Plastic section modulusZy
2.46in³
Radius of gyrationry
0.64in

Torsion and stability

Torsional constantJ
0.427in⁴
Warping constantCw
39.4in⁶
Effective radius of gyrationrts
0.85in
Polar radius (shear center)r̄o
3.46in
Flexural constantH
0.899
Shear centereo
0.515in

Centers

Centroidx̄
0.583in
Plastic neutral axisxp
0.326in

Slenderness ratios

Web slendernessh/tw
16.2
Wall slendernessb/t
6.42

Equivalents in other standards