C shapes (standard channels)

C4X4.5 C100X6.7

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 = 1.52d = 4tf = 0.296tf = 0.296tw = 0.125tw = 0.125
Cross-section, to scaledimensions in inches

Dimensions

Depthd
4in
Flange widthbf
1.52in
Web thicknesstw
0.125in
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
4.5lb/ft
Cross-sectional areaA
1.34in²

Strong axis x–x

Moment of inertiaIx
3.53in⁴
Elastic section modulusSx
1.77in³
Plastic section modulusZx
2.05in³
Radius of gyrationrx
1.62in

Weak axis y–y

Moment of inertiaIy
0.265in⁴
Elastic section modulusSy
0.253in³
Plastic section modulusZy
0.495in³
Radius of gyrationry
0.445in

Torsion and stability

Torsional constantJ
0.0306in⁴
Warping constantCw
0.778in⁶
Effective radius of gyrationrts
0.506in
Polar radius (shear center)r̄o
1.97in
Flexural constantH
0.727
Shear centereo
0.556in

Centers

Centroidx̄
0.473in
Plastic neutral axisxp
0.305in

Slenderness ratios

Web slendernessh/tw
21.6
Wall slendernessb/t
5.14

Equivalents in other standards