C shapes (standard channels)

C8X13.75 C200X20.5

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 = 2.34d = 8tf = 0.39tf = 0.39tw = 0.303tw = 0.303
Cross-section, to scaledimensions in inches

Dimensions

Depthd
8in
Flange widthbf
2.34in
Web thicknesstw
0.303in
Flange thicknesstf
0.39in
Distance k (design)kdes
0.938in
Distance k (detailing)kdet
0.9375in
Web clear depthT
6.125in
Distance between flange centroidsho
7.61in

Mass and area

Mass per lengthm
13.75lb/ft
Cross-sectional areaA
4.03in²

Strong axis x–x

Moment of inertiaIx
36.1in⁴
Elastic section modulusSx
9.02in³
Plastic section modulusZx
11in³
Radius of gyrationrx
2.99in

Weak axis y–y

Moment of inertiaIy
1.52in⁴
Elastic section modulusSy
0.848in³
Plastic section modulusZy
1.73in³
Radius of gyrationry
0.613in

Torsion and stability

Torsional constantJ
0.186in⁴
Warping constantCw
19.2in⁶
Effective radius of gyrationrts
0.774in
Polar radius (shear center)r̄o
3.26in
Flexural constantH
0.874
Shear centereo
0.604in

Centers

Centroidx̄
0.554in
Plastic neutral axisxp
0.252in

Slenderness ratios

Web slendernessh/tw
21
Wall slendernessb/t
6

Equivalents in other standards