C – standard channels

C180x22

Standard: ASTM A6/A6M (désignations métriques)Source: SI values from the AISC v16.0 database (ASTM A6 shapes common to Canada)
ASTM A6 rolled shapes are the same in Canada; the CISC list may differ slightly (availability).
xybf = 58.4d = 178tf = 9.3tf = 9.3tw = 10.6tw = 10.6
Cross-section, to scaledimensions in mm

Dimensions

Depthd
178mm
Flange widthbf
58.4mm
Web thicknesstw
10.6mm
Flange thicknesstf
9.3mm
Distance k (design)kdes
22.2mm
Distance k (detailing)kdet
22.2mm
Web clear depthT
133mm
Distance between flange centroidsho
168mm

Mass and area

Mass per lengthm
22kg/m
Cross-sectional areaA
2,790mm²

Strong axis x–x

Moment of inertiaIx
11.310⁶ mm⁴
Elastic section modulusSx
12710³ mm³
Plastic section modulusZx
16010³ mm³
Radius of gyrationrx
63.8mm

Weak axis y–y

Moment of inertiaIy
0.5710⁶ mm⁴
Elastic section modulusSy
12.710³ mm³
Plastic section modulusZy
26.710³ mm³
Radius of gyrationry
14.2mm

Torsion and stability

Torsional constantJ
11110³ mm⁴
Warping constantCw
3.5210⁹ mm⁶
Effective radius of gyrationrts
18.7mm
Polar radius (shear center)r̄o
69.9mm
Flexural constantH
0.875
Shear centereo
11.2mm

Centers

Centroidx̄
13.5mm
Plastic neutral axisxp
7.85mm

Slenderness ratios

Web slendernessh/tw
12.9
Wall slendernessb/t
6.28

Equivalents in other standards