C shapes (standard channels)

C9X13.4 C230X19.9

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 = 2.43d = 9tf = 0.413tf = 0.413tw = 0.233tw = 0.233
Cross-section, to scaledimensions in inches

Dimensions

Depthd
9in
Flange widthbf
2.43in
Web thicknesstw
0.233in
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
13.4lb/ft
Cross-sectional areaA
3.94in²

Strong axis x–x

Moment of inertiaIx
47.8in⁴
Elastic section modulusSx
10.6in³
Plastic section modulusZx
12.6in³
Radius of gyrationrx
3.48in

Weak axis y–y

Moment of inertiaIy
1.75in⁴
Elastic section modulusSy
0.954in³
Plastic section modulusZy
1.94in³
Radius of gyrationry
0.666in

Torsion and stability

Torsional constantJ
0.168in⁴
Warping constantCw
28.2in⁶
Effective radius of gyrationrts
0.814in
Polar radius (shear center)r̄o
3.79in
Flexural constantH
0.875
Shear centereo
0.742in

Centers

Centroidx̄
0.601in
Plastic neutral axisxp
0.219in

Slenderness ratios

Web slendernessh/tw
31.1
Wall slendernessb/t
5.88

Equivalents in other standards