IR – wide flange (ASTM A6 W)

IR 250x149

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 = 262d = 282tf = 28.4tf = 28.4tw = 17.3tw = 17.3
Cross-section, to scaledimensions in mm

Dimensions

Depthd
282mm
Flange widthbf
262mm
Web thicknesstw
17.3mm
Flange thicknesstf
28.4mm
Distance k (design)kdes
41.1mm
Distance k (detailing)kdet
46mm
Distance k1k1
25.4mm
Web clear depthT
191mm
Distance between flange centroidsho
254mm

Mass and area

Mass per lengthm
149kg/m
Cross-sectional areaA
18,900mm²

Strong axis x–x

Moment of inertiaIx
25910⁶ mm⁴
Elastic section modulusSx
1,84010³ mm³
Plastic section modulusZx
2,13010³ mm³
Radius of gyrationrx
117mm

Weak axis y–y

Moment of inertiaIy
86.210⁶ mm⁴
Elastic section modulusSy
65510³ mm³
Plastic section modulusZy
1,00010³ mm³
Radius of gyrationry
67.3mm

Torsion and stability

Torsional constantJ
4,54010³ mm⁴
Warping constantCw
1,38010⁹ mm⁶
Effective radius of gyrationrts
77.2mm

Slenderness ratios

Flange slendernessbf/2tf
4.62
Web slendernessh/tw
11.6

Equivalents in other standards