C shapes (standard channels)

C15X33.9 C380X50.4

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 = 3.4d = 15tf = 0.65tf = 0.65tw = 0.4tw = 0.4
Cross-section, to scaledimensions in inches

Dimensions

Depthd
15in
Flange widthbf
3.4in
Web thicknesstw
0.4in
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
33.9lb/ft
Cross-sectional areaA
10in²

Strong axis x–x

Moment of inertiaIx
315in⁴
Elastic section modulusSx
42in³
Plastic section modulusZx
50.8in³
Radius of gyrationrx
5.61in

Weak axis y–y

Moment of inertiaIy
8.07in⁴
Elastic section modulusSy
3.09in³
Plastic section modulusZy
6.19in³
Radius of gyrationry
0.901in

Torsion and stability

Torsional constantJ
1.01in⁴
Warping constantCw
358in⁶
Effective radius of gyrationrts
1.13in
Polar radius (shear center)r̄o
5.94in
Flexural constantH
0.92
Shear centereo
0.896in

Centers

Centroidx̄
0.788in
Plastic neutral axisxp
0.332in

Slenderness ratios

Web slendernessh/tw
30.9
Wall slendernessb/t
5.23

Equivalents in other standards