W – wide flange

W250x25.3

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 = 102d = 257tf = 8.38tf = 8.38tw = 6.1tw = 6.1
Cross-section, to scaledimensions in mm

Dimensions

Depthd
257mm
Flange widthbf
102mm
Web thicknesstw
6.1mm
Flange thicknesstf
8.38mm
Distance k (design)kdes
16mm
Distance k (detailing)kdet
22.2mm
Distance k1k1
14.3mm
Web clear depthT
213mm
Distance between flange centroidsho
248mm

Mass and area

Mass per lengthm
25.3kg/m
Cross-sectional areaA
3,220mm²

Strong axis x–x

Moment of inertiaIx
34.110⁶ mm⁴
Elastic section modulusSx
26510³ mm³
Plastic section modulusZx
30610³ mm³
Radius of gyrationrx
103mm

Weak axis y–y

Moment of inertiaIy
1.4810⁶ mm⁴
Elastic section modulusSy
29.210³ mm³
Plastic section modulusZy
45.910³ mm³
Radius of gyrationry
21.5mm

Torsion and stability

Torsional constantJ
64.910³ mm⁴
Warping constantCw
22.910⁹ mm⁶
Effective radius of gyrationrts
26.4mm

Slenderness ratios

Flange slendernessbf/2tf
6.08
Web slendernessh/tw
36.9

Equivalents in other standards