C – standard channels

C180x18.2

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 = 55.6d = 178tf = 9.3tf = 9.3tw = 7.98tw = 7.98
Cross-section, to scaledimensions in mm

Dimensions

Depthd
178mm
Flange widthbf
55.6mm
Web thicknesstw
7.98mm
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
18.2kg/m
Cross-sectional areaA
2,320mm²

Strong axis x–x

Moment of inertiaIx
10.110⁶ mm⁴
Elastic section modulusSx
11310³ mm³
Plastic section modulusZx
13910³ mm³
Radius of gyrationrx
65.8mm

Weak axis y–y

Moment of inertiaIy
0.48310⁶ mm⁴
Elastic section modulusSy
11.410³ mm³
Plastic section modulusZy
23.310³ mm³
Radius of gyrationry
14.4mm

Torsion and stability

Torsional constantJ
6710³ mm⁴
Warping constantCw
3.0110⁹ mm⁶
Effective radius of gyrationrts
18.3mm
Polar radius (shear center)r̄o
72.6mm
Flexural constantH
0.862
Shear centereo
13.7mm

Centers

Centroidx̄
13.3mm
Plastic neutral axisxp
6.53mm

Slenderness ratios

Web slendernessh/tw
17.3
Wall slendernessb/t
5.98

Equivalents in other standards