C – standard channels

C75x7.4

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 = 38.1d = 76.2tf = 6.93tf = 6.93tw = 6.55tw = 6.55
Cross-section, to scaledimensions in mm

Dimensions

Depthd
76.2mm
Flange widthbf
38.1mm
Web thicknesstw
6.55mm
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
7.4kg/m
Cross-sectional areaA
948mm²

Strong axis x–x

Moment of inertiaIx
0.7710⁶ mm⁴
Elastic section modulusSx
20.210³ mm³
Plastic section modulusZx
24.910³ mm³
Radius of gyrationrx
28.4mm

Weak axis y–y

Moment of inertiaIy
0.110⁶ mm⁴
Elastic section modulusSy
3.7410³ mm³
Plastic section modulusZy
7.610³ mm³
Radius of gyrationry
10.3mm

Torsion and stability

Torsional constantJ
17.710³ mm⁴
Warping constantCw
0.10210⁹ mm⁶
Effective radius of gyrationrts
12.6mm
Polar radius (shear center)r̄o
36.8mm
Flexural constantH
0.673
Shear centereo
9.96mm

Centers

Centroidx̄
11.2mm
Plastic neutral axisxp
6.22mm

Slenderness ratios

Web slendernessh/tw
6.94
Wall slendernessb/t
5.49

Equivalents in other standards