C – standard channels

C75x8.9

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 = 40.6d = 76.2tf = 6.93tf = 6.93tw = 9.04tw = 9.04
Cross-section, to scaledimensions in mm

Dimensions

Depthd
76.2mm
Flange widthbf
40.6mm
Web thicknesstw
9.04mm
Flange thicknesstf
6.93mm
Distance k (design)kdes
17.5mm
Distance k (detailing)kdet
17.5mm
Web clear depthT
41.3mm
Distance between flange centroidsho
69.3mm

Mass and area

Mass per lengthm
8.9kg/m
Cross-sectional areaA
1,140mm²

Strong axis x–x

Moment of inertiaIx
0.86210⁶ mm⁴
Elastic section modulusSx
22.610³ mm³
Plastic section modulusZx
28.510³ mm³
Radius of gyrationrx
27.7mm

Weak axis y–y

Moment of inertiaIy
0.12510⁶ mm⁴
Elastic section modulusSy
4.3110³ mm³
Plastic section modulusZy
8.910³ mm³
Radius of gyrationry
10.5mm

Torsion and stability

Torsional constantJ
30.210³ mm⁴
Warping constantCw
0.12410⁹ mm⁶
Effective radius of gyrationrts
13.2mm
Polar radius (shear center)r̄o
35.6mm
Flexural constantH
0.69
Shear centereo
8.18mm

Centers

Centroidx̄
11.6mm
Plastic neutral axisxp
7.47mm

Slenderness ratios

Web slendernessh/tw
5.03
Wall slendernessb/t
5.86

Equivalents in other standards