W – wide flange

W250x17.9

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 = 251tf = 5.33tf = 5.33tw = 4.83tw = 4.83
Cross-section, to scaledimensions in mm

Dimensions

Depthd
251mm
Flange widthbf
101mm
Web thicknesstw
4.83mm
Flange thicknesstf
5.33mm
Distance k (design)kdes
13mm
Distance k (detailing)kdet
19.1mm
Distance k1k1
14.3mm
Web clear depthT
213mm
Distance between flange centroidsho
245mm

Mass and area

Mass per lengthm
17.9kg/m
Cross-sectional areaA
2,280mm²

Strong axis x–x

Moment of inertiaIx
22.410⁶ mm⁴
Elastic section modulusSx
17910³ mm³
Plastic section modulusZx
20610³ mm³
Radius of gyrationrx
99.1mm

Weak axis y–y

Moment of inertiaIy
0.90710⁶ mm⁴
Elastic section modulusSy
1810³ mm³
Plastic section modulusZy
28.510³ mm³
Radius of gyrationry
19.9mm

Torsion and stability

Torsional constantJ
22.810³ mm⁴
Warping constantCw
13.710⁹ mm⁶
Effective radius of gyrationrts
25mm

Slenderness ratios

Flange slendernessbf/2tf
9.43
Web slendernessh/tw
46.6

Equivalents in other standards