C shapes (standard channels)

C8X18.75 C200X27.9

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 = 2.53d = 8tf = 0.39tf = 0.39tw = 0.487tw = 0.487
Cross-section, to scaledimensions in inches

Dimensions

Depthd
8in
Flange widthbf
2.53in
Web thicknesstw
0.487in
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
18.75lb/ft
Cross-sectional areaA
5.51in²

Strong axis x–x

Moment of inertiaIx
43.9in⁴
Elastic section modulusSx
11in³
Plastic section modulusZx
13.9in³
Radius of gyrationrx
2.82in

Weak axis y–y

Moment of inertiaIy
1.97in⁴
Elastic section modulusSy
1.01in³
Plastic section modulusZy
2.17in³
Radius of gyrationry
0.598in

Torsion and stability

Torsional constantJ
0.434in⁴
Warping constantCw
25.1in⁶
Effective radius of gyrationrts
0.8in
Polar radius (shear center)r̄o
3.05in
Flexural constantH
0.894
Shear centereo
0.431in

Centers

Centroidx̄
0.565in
Plastic neutral axisxp
0.344in

Slenderness ratios

Web slendernessh/tw
13
Wall slendernessb/t
6.49

Equivalents in other standards