IR – wide flange (ASTM A6 W)

IR 250x131

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 = 274tf = 25.1tf = 25.1tw = 15.4tw = 15.4
Cross-section, to scaledimensions in mm

Dimensions

Depthd
274mm
Flange widthbf
262mm
Web thicknesstw
15.4mm
Flange thicknesstf
25.1mm
Distance k (design)kdes
37.8mm
Distance k (detailing)kdet
42.9mm
Distance k1k1
23.8mm
Web clear depthT
191mm
Distance between flange centroidsho
249mm

Mass and area

Mass per lengthm
131kg/m
Cross-sectional areaA
16,800mm²

Strong axis x–x

Moment of inertiaIx
22210⁶ mm⁴
Elastic section modulusSx
1,61010³ mm³
Plastic section modulusZx
1,85010³ mm³
Radius of gyrationrx
115mm

Weak axis y–y

Moment of inertiaIy
74.510⁶ mm⁴
Elastic section modulusSy
57010³ mm³
Plastic section modulusZy
87010³ mm³
Radius of gyrationry
66.8mm

Torsion and stability

Torsional constantJ
3,13010³ mm⁴
Warping constantCw
1,16010⁹ mm⁶
Effective radius of gyrationrts
75.9mm

Slenderness ratios

Flange slendernessbf/2tf
5.18
Web slendernessh/tw
13

Equivalents in other standards