W – wide flange

W310x74

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 = 205d = 310tf = 16.3tf = 16.3tw = 9.4tw = 9.4
Cross-section, to scaledimensions in mm

Dimensions

Depthd
310mm
Flange widthbf
205mm
Web thicknesstw
9.4mm
Flange thicknesstf
16.3mm
Distance k (design)kdes
29mm
Distance k (detailing)kdet
38.1mm
Distance k1k1
23.8mm
Web clear depthT
235mm
Distance between flange centroidsho
295mm

Mass and area

Mass per lengthm
74kg/m
Cross-sectional areaA
9,420mm²

Strong axis x–x

Moment of inertiaIx
16310⁶ mm⁴
Elastic section modulusSx
1,05010³ mm³
Plastic section modulusZx
1,18010³ mm³
Radius of gyrationrx
132mm

Weak axis y–y

Moment of inertiaIy
23.410⁶ mm⁴
Elastic section modulusSy
22810³ mm³
Plastic section modulusZy
34910³ mm³
Radius of gyrationry
49.8mm

Torsion and stability

Torsional constantJ
71210³ mm⁴
Warping constantCw
50510⁹ mm⁶
Effective radius of gyrationrts
57.2mm

Slenderness ratios

Flange slendernessbf/2tf
6.31
Web slendernessh/tw
26.8

Equivalents in other standards