C shapes (standard channels)

C15X40 C380X60

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 = 3.52d = 15tf = 0.65tf = 0.65tw = 0.52tw = 0.52
Cross-section, to scaledimensions in inches

Dimensions

Depthd
15in
Flange widthbf
3.52in
Web thicknesstw
0.52in
Flange thicknesstf
0.65in
Distance k (design)kdes
1.44in
Distance k (detailing)kdet
1.438in
Web clear depthT
12.13in
Distance between flange centroidsho
14.4in

Mass and area

Mass per lengthm
40lb/ft
Cross-sectional areaA
11.8in²

Strong axis x–x

Moment of inertiaIx
348in⁴
Elastic section modulusSx
46.5in³
Plastic section modulusZx
57.5in³
Radius of gyrationrx
5.43in

Weak axis y–y

Moment of inertiaIy
9.17in⁴
Elastic section modulusSy
3.34in³
Plastic section modulusZy
6.84in³
Radius of gyrationry
0.883in

Torsion and stability

Torsional constantJ
1.45in⁴
Warping constantCw
410in⁶
Effective radius of gyrationrts
1.15in
Polar radius (shear center)r̄o
5.71in
Flexural constantH
0.927
Shear centereo
0.767in

Centers

Centroidx̄
0.778in
Plastic neutral axisxp
0.392in

Slenderness ratios

Web slendernessh/tw
23.8
Wall slendernessb/t
5.42

Equivalents in other standards