C shapes (standard channels)

C4X5.4 C100X8

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 = 1.58d = 4tf = 0.296tf = 0.296tw = 0.184tw = 0.184
Cross-section, to scaledimensions in inches

Dimensions

Depthd
4in
Flange widthbf
1.58in
Web thicknesstw
0.184in
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
5.4lb/ft
Cross-sectional areaA
1.58in²

Strong axis x–x

Moment of inertiaIx
3.85in⁴
Elastic section modulusSx
1.92in³
Plastic section modulusZx
2.29in³
Radius of gyrationrx
1.56in

Weak axis y–y

Moment of inertiaIy
0.312in⁴
Elastic section modulusSy
0.277in³
Plastic section modulusZy
0.565in³
Radius of gyrationry
0.444in

Torsion and stability

Torsional constantJ
0.0399in⁴
Warping constantCw
0.921in⁶
Effective radius of gyrationrts
0.528in
Polar radius (shear center)r̄o
1.88in
Flexural constantH
0.742
Shear centereo
0.501in

Centers

Centroidx̄
0.457in
Plastic neutral axisxp
0.231in

Slenderness ratios

Web slendernessh/tw
14.7
Wall slendernessb/t
5.34

Equivalents in other standards