C shapes (standard channels)

C4X7.25 C100X10.8

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 = 1.72d = 4tf = 0.296tf = 0.296tw = 0.321tw = 0.321
Cross-section, to scaledimensions in inches

Dimensions

Depthd
4in
Flange widthbf
1.72in
Web thicknesstw
0.321in
Flange thicknesstf
0.296in
Distance k (design)kdes
0.75in
Distance k (detailing)kdet
0.75in
Web clear depthT
2.5in
Distance between flange centroidsho
3.7in

Mass and area

Mass per lengthm
7.25lb/ft
Cross-sectional areaA
2.13in²

Strong axis x–x

Moment of inertiaIx
4.58in⁴
Elastic section modulusSx
2.29in³
Plastic section modulusZx
2.84in³
Radius of gyrationrx
1.47in

Weak axis y–y

Moment of inertiaIy
0.425in⁴
Elastic section modulusSy
0.337in³
Plastic section modulusZy
0.695in³
Radius of gyrationry
0.447in

Torsion and stability

Torsional constantJ
0.0817in⁴
Warping constantCw
1.24in⁶
Effective radius of gyrationrts
0.563in
Polar radius (shear center)r̄o
1.75in
Flexural constantH
0.767
Shear centereo
0.386in

Centers

Centroidx̄
0.459in
Plastic neutral axisxp
0.266in

Slenderness ratios

Web slendernessh/tw
8.41
Wall slendernessb/t
5.81

Equivalents in other standards