IR – wide flange (ASTM A6 W)

IR 310x44.5

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 = 166d = 312tf = 11.2tf = 11.2tw = 6.6tw = 6.6
Cross-section, to scaledimensions in mm

Dimensions

Depthd
312mm
Flange widthbf
166mm
Web thicknesstw
6.6mm
Flange thicknesstf
11.2mm
Distance k (design)kdes
18.8mm
Distance k (detailing)kdet
28.6mm
Distance k1k1
19.1mm
Web clear depthT
257mm
Distance between flange centroidsho
302mm

Mass and area

Mass per lengthm
44.5kg/m
Cross-sectional areaA
5,670mm²

Strong axis x–x

Moment of inertiaIx
99.110⁶ mm⁴
Elastic section modulusSx
63310³ mm³
Plastic section modulusZx
70610³ mm³
Radius of gyrationrx
132mm

Weak axis y–y

Moment of inertiaIy
8.4510⁶ mm⁴
Elastic section modulusSy
10210³ mm³
Plastic section modulusZy
15710³ mm³
Radius of gyrationry
38.6mm

Torsion and stability

Torsional constantJ
19010³ mm⁴
Warping constantCw
19310⁹ mm⁶
Effective radius of gyrationrts
45mm

Slenderness ratios

Flange slendernessbf/2tf
7.41
Web slendernessh/tw
41.8

Equivalents in other standards