C – standard channels

C250x45

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 = 77d = 254tf = 11.1tf = 11.1tw = 17.1tw = 17.1
Cross-section, to scaledimensions in mm

Dimensions

Depthd
254mm
Flange widthbf
77mm
Web thicknesstw
17.1mm
Flange thicknesstf
11.1mm
Distance k (design)kdes
25.4mm
Distance k (detailing)kdet
27mm
Web clear depthT
203mm
Distance between flange centroidsho
243mm

Mass and area

Mass per lengthm
45kg/m
Cross-sectional areaA
5,680mm²

Strong axis x–x

Moment of inertiaIx
42.910⁶ mm⁴
Elastic section modulusSx
33910³ mm³
Plastic section modulusZx
43810³ mm³
Radius of gyrationrx
87.1mm

Weak axis y–y

Moment of inertiaIy
1.6410⁶ mm⁴
Elastic section modulusSy
2710³ mm³
Plastic section modulusZy
61.910³ mm³
Radius of gyrationry
17mm

Torsion and stability

Torsional constantJ
50810³ mm⁴
Warping constantCw
21.310⁹ mm⁶
Effective radius of gyrationrts
23.5mm
Polar radius (shear center)r̄o
92.2mm
Flexural constantH
0.921
Shear centereo
9.35mm

Centers

Centroidx̄
16.5mm
Plastic neutral axisxp
11.2mm

Slenderness ratios

Web slendernessh/tw
12.1
Wall slendernessb/t
6.95

Equivalents in other standards