IR – wide flange (ASTM A6 W)

IR 1100x499

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 = 404d = 1,120tf = 45tf = 45tw = 26.2tw = 26.2
Cross-section, to scaledimensions in mm

Dimensions

Depthd
1,120mm
Flange widthbf
404mm
Web thicknesstw
26.2mm
Flange thicknesstf
45mm
Distance k (design)kdes
65mm
Distance k (detailing)kdet
76.2mm
Distance k1k1
44.5mm
Web clear depthT
965mm
Distance between flange centroidsho
1,070mm

Mass and area

Mass per lengthm
499kg/m
Cross-sectional areaA
63,500mm²

Strong axis x–x

Moment of inertiaIx
12,90010⁶ mm⁴
Elastic section modulusSx
23,10010³ mm³
Plastic section modulusZx
26,50010³ mm³
Radius of gyrationrx
452mm

Weak axis y–y

Moment of inertiaIy
49910⁶ mm⁴
Elastic section modulusSy
2,46010³ mm³
Plastic section modulusZy
3,87010³ mm³
Radius of gyrationry
88.6mm

Torsion and stability

Torsional constantJ
31,10010³ mm⁴
Warping constantCw
144,00010⁹ mm⁶
Effective radius of gyrationrts
108mm

Slenderness ratios

Flange slendernessbf/2tf
4.5
Web slendernessh/tw
38

Equivalents in other standards