C shapes (standard channels)

C4X6.25 C100X9.3

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 = 1.65d = 4tf = 0.296tf = 0.296tw = 0.247tw = 0.247
Cross-section, to scaledimensions in inches

Dimensions

Depthd
4in
Flange widthbf
1.65in
Web thicknesstw
0.247in
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
6.25lb/ft
Cross-sectional areaA
1.84in²

Strong axis x–x

Moment of inertiaIx
4.19in⁴
Elastic section modulusSx
2.1in³
Plastic section modulusZx
2.55in³
Radius of gyrationrx
1.51in

Weak axis y–y

Moment of inertiaIy
0.374in⁴
Elastic section modulusSy
0.312in³
Plastic section modulusZy
0.623in³
Radius of gyrationry
0.451in

Torsion and stability

Torsional constantJ
0.0549in⁴
Warping constantCw
1.07in⁶
Effective radius of gyrationrts
0.549in
Polar radius (shear center)r̄o
1.81in
Flexural constantH
0.753
Shear centereo
0.447in

Centers

Centroidx̄
0.453in
Plastic neutral axisxp
0.233in

Slenderness ratios

Web slendernessh/tw
10.9
Wall slendernessb/t
5.57

Equivalents in other standards