S – standard beams

S250x37.8

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 = 118d = 254tf = 12.5tf = 12.5tw = 7.9tw = 7.9
Cross-section, to scaledimensions in mm

Dimensions

Depthd
254mm
Flange widthbf
118mm
Web thicknesstw
7.9mm
Flange thicknesstf
12.5mm
Distance k (design)kdes
28.7mm
Distance k (detailing)kdet
28.6mm
Web clear depthT
197mm
Distance between flange centroidsho
242mm

Mass and area

Mass per lengthm
37.8kg/m
Cross-sectional areaA
4,810mm²

Strong axis x–x

Moment of inertiaIx
51.210⁶ mm⁴
Elastic section modulusSx
40310³ mm³
Plastic section modulusZx
46410³ mm³
Radius of gyrationrx
103mm

Weak axis y–y

Moment of inertiaIy
2.810⁶ mm⁴
Elastic section modulusSy
47.410³ mm³
Plastic section modulusZy
81.810³ mm³
Radius of gyrationry
24.1mm

Torsion and stability

Torsional constantJ
25110³ mm⁴
Warping constantCw
40.810⁹ mm⁶
Effective radius of gyrationrts
29mm

Slenderness ratios

Flange slendernessbf/2tf
4.75
Web slendernessh/tw
25.6

Equivalents in other standards