IR – wide flange (ASTM A6 W)

IR 920x474

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 = 315d = 970tf = 54.1tf = 54.1tw = 30tw = 30
Cross-section, to scaledimensions in mm

Dimensions

Depthd
970mm
Flange widthbf
315mm
Web thicknesstw
30mm
Flange thicknesstf
54.1mm
Distance k (design)kdes
73.2mm
Distance k (detailing)kdet
85.7mm
Distance k1k1
46mm
Web clear depthT
800mm
Distance between flange centroidsho
917mm

Mass and area

Mass per lengthm
474kg/m
Cross-sectional areaA
60,300mm²

Strong axis x–x

Moment of inertiaIx
8,82010⁶ mm⁴
Elastic section modulusSx
18,20010³ mm³
Plastic section modulusZx
21,30010³ mm³
Radius of gyrationrx
384mm

Weak axis y–y

Moment of inertiaIy
28410⁶ mm⁴
Elastic section modulusSy
1,80010³ mm³
Plastic section modulusZy
2,88010³ mm³
Radius of gyrationry
68.6mm

Torsion and stability

Torsional constantJ
40,90010³ mm⁴
Warping constantCw
59,60010⁹ mm⁶
Effective radius of gyrationrts
84.6mm

Slenderness ratios

Flange slendernessbf/2tf
2.91
Web slendernessh/tw
27.5

Equivalents in other standards