IR – wide flange (ASTM A6 W)

IR 410x85

Standard: ASTM A6 / IMCASource: SI values from the AISC v16.0 database
IR designation built from the metric W; cross-check with the IMCA Manual.
xybf = 181d = 417tf = 18.2tf = 18.2tw = 10.9tw = 10.9
Cross-section, to scaledimensions in mm

Dimensions

Depthd
417mm
Flange widthbf
181mm
Web thicknesstw
10.9mm
Flange thicknesstf
18.2mm
Distance k (design)kdes
28.4mm
Distance k (detailing)kdet
34.9mm
Distance k1k1
22.2mm
Web clear depthT
346mm
Distance between flange centroidsho
399mm

Mass and area

Mass per lengthm
85kg/m
Cross-sectional areaA
10,800mm²

Strong axis x–x

Moment of inertiaIx
31610⁶ mm⁴
Elastic section modulusSx
1,51010³ mm³
Plastic section modulusZx
1,72010³ mm³
Radius of gyrationrx
171mm

Weak axis y–y

Moment of inertiaIy
17.910⁶ mm⁴
Elastic section modulusSy
19810³ mm³
Plastic section modulusZy
31010³ mm³
Radius of gyrationry
40.6mm

Torsion and stability

Torsional constantJ
92410³ mm⁴
Warping constantCw
71410⁹ mm⁶
Effective radius of gyrationrts
48.8mm

Slenderness ratios

Flange slendernessbf/2tf
4.98
Web slendernessh/tw
33

Equivalents in other standards