C shapes (standard channels)

C7X14.75 C180X22

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 = 2.3d = 7tf = 0.366tf = 0.366tw = 0.419tw = 0.419
Cross-section, to scaledimensions in inches

Dimensions

Depthd
7in
Flange widthbf
2.3in
Web thicknesstw
0.419in
Flange thicknesstf
0.366in
Distance k (design)kdes
0.875in
Distance k (detailing)kdet
0.875in
Web clear depthT
5.25in
Distance between flange centroidsho
6.63in

Mass and area

Mass per lengthm
14.75lb/ft
Cross-sectional areaA
4.33in²

Strong axis x–x

Moment of inertiaIx
27.2in⁴
Elastic section modulusSx
7.78in³
Plastic section modulusZx
9.75in³
Radius of gyrationrx
2.51in

Weak axis y–y

Moment of inertiaIy
1.37in⁴
Elastic section modulusSy
0.772in³
Plastic section modulusZy
1.63in³
Radius of gyrationry
0.561in

Torsion and stability

Torsional constantJ
0.267in⁴
Warping constantCw
13.1in⁶
Effective radius of gyrationrts
0.738in
Polar radius (shear center)r̄o
2.75in
Flexural constantH
0.875
Shear centereo
0.441in

Centers

Centroidx̄
0.532in
Plastic neutral axisxp
0.309in

Slenderness ratios

Web slendernessh/tw
12.9
Wall slendernessb/t
6.28

Equivalents in other standards