W – wide flange

W310x21

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 = 101d = 302tf = 5.72tf = 5.72tw = 5.08tw = 5.08
Cross-section, to scaledimensions in mm

Dimensions

Depthd
302mm
Flange widthbf
101mm
Web thicknesstw
5.08mm
Flange thicknesstf
5.72mm
Distance k (design)kdes
13.3mm
Distance k (detailing)kdet
19.1mm
Distance k1k1
14.3mm
Web clear depthT
264mm
Distance between flange centroidsho
297mm

Mass and area

Mass per lengthm
21kg/m
Cross-sectional areaA
2,680mm²

Strong axis x–x

Moment of inertiaIx
36.910⁶ mm⁴
Elastic section modulusSx
24410³ mm³
Plastic section modulusZx
28510³ mm³
Radius of gyrationrx
117mm

Weak axis y–y

Moment of inertiaIy
0.98210⁶ mm⁴
Elastic section modulusSy
19.510³ mm³
Plastic section modulusZy
31.110³ mm³
Radius of gyrationry
19.1mm

Torsion and stability

Torsional constantJ
29.310³ mm⁴
Warping constantCw
21.610⁹ mm⁶
Effective radius of gyrationrts
24.4mm

Slenderness ratios

Flange slendernessbf/2tf
8.82
Web slendernessh/tw
54.3

Equivalents in other standards