C – standard channels

C200x20.5

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 = 59.4d = 203tf = 9.91tf = 9.91tw = 7.7tw = 7.7
Cross-section, to scaledimensions in mm

Dimensions

Depthd
203mm
Flange widthbf
59.4mm
Web thicknesstw
7.7mm
Flange thicknesstf
9.91mm
Distance k (design)kdes
23.8mm
Distance k (detailing)kdet
23.8mm
Web clear depthT
156mm
Distance between flange centroidsho
193mm

Mass and area

Mass per lengthm
20.5kg/m
Cross-sectional areaA
2,600mm²

Strong axis x–x

Moment of inertiaIx
1510⁶ mm⁴
Elastic section modulusSx
14810³ mm³
Plastic section modulusZx
18010³ mm³
Radius of gyrationrx
75.9mm

Weak axis y–y

Moment of inertiaIy
0.63310⁶ mm⁴
Elastic section modulusSy
13.910³ mm³
Plastic section modulusZy
28.310³ mm³
Radius of gyrationry
15.6mm

Torsion and stability

Torsional constantJ
77.410³ mm⁴
Warping constantCw
5.1610⁹ mm⁶
Effective radius of gyrationrts
19.7mm
Polar radius (shear center)r̄o
82.8mm
Flexural constantH
0.874
Shear centereo
15.3mm

Centers

Centroidx̄
14.1mm
Plastic neutral axisxp
6.4mm

Slenderness ratios

Web slendernessh/tw
21
Wall slendernessb/t
6

Equivalents in other standards