W – wide flange

W310x129

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 = 307d = 318tf = 20.6tf = 20.6tw = 13.1tw = 13.1
Cross-section, to scaledimensions in mm

Dimensions

Depthd
318mm
Flange widthbf
307mm
Web thicknesstw
13.1mm
Flange thicknesstf
20.6mm
Distance k (design)kdes
35.8mm
Distance k (detailing)kdet
42.9mm
Distance k1k1
27mm
Web clear depthT
232mm
Distance between flange centroidsho
297mm

Mass and area

Mass per lengthm
129kg/m
Cross-sectional areaA
16,500mm²

Strong axis x–x

Moment of inertiaIx
30810⁶ mm⁴
Elastic section modulusSx
1,93010³ mm³
Plastic section modulusZx
2,16010³ mm³
Radius of gyrationrx
137mm

Weak axis y–y

Moment of inertiaIy
10010⁶ mm⁴
Elastic section modulusSy
65110³ mm³
Plastic section modulusZy
99010³ mm³
Radius of gyrationry
78mm

Torsion and stability

Torsional constantJ
2,12010³ mm⁴
Warping constantCw
2,22010⁹ mm⁶
Effective radius of gyrationrts
87.9mm

Slenderness ratios

Flange slendernessbf/2tf
7.48
Web slendernessh/tw
18.9

Equivalents in other standards