IR – wide flange (ASTM A6 W)

IR 250x80

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 = 254d = 257tf = 15.6tf = 15.6tw = 9.4tw = 9.4
Cross-section, to scaledimensions in mm

Dimensions

Depthd
257mm
Flange widthbf
254mm
Web thicknesstw
9.4mm
Flange thicknesstf
15.6mm
Distance k (design)kdes
28.4mm
Distance k (detailing)kdet
33.3mm
Distance k1k1
20.6mm
Web clear depthT
191mm
Distance between flange centroidsho
241mm

Mass and area

Mass per lengthm
80kg/m
Cross-sectional areaA
10,200mm²

Strong axis x–x

Moment of inertiaIx
12610⁶ mm⁴
Elastic section modulusSx
98310³ mm³
Plastic section modulusZx
1,09010³ mm³
Radius of gyrationrx
111mm

Weak axis y–y

Moment of inertiaIy
42.910⁶ mm⁴
Elastic section modulusSy
33810³ mm³
Plastic section modulusZy
51310³ mm³
Radius of gyrationry
65mm

Torsion and stability

Torsional constantJ
75810³ mm⁴
Warping constantCw
62310⁹ mm⁶
Effective radius of gyrationrts
72.4mm

Slenderness ratios

Flange slendernessbf/2tf
8.15
Web slendernessh/tw
21.2

Equivalents in other standards