IR – wide flange (ASTM A6 W)
IR 310x21
IR designation built from the metric W; cross-check with the IMCA Manual.
Dimensions
- Depthd
- 302mm
- Flange widthbf
- 101mm
- Web thicknesstw
- 5.08mm
- Flange thicknesstf
- 5.72mm
- Distance k (design)kdes
- 13.3mm
- Distance k (detailing)kdet
- 19.1mm
- Distance k1k1
- 14.3mm
- Web clear depthT
- 264mm
- Distance between flange centroidsho
- 297mm
Mass and area
- Mass per lengthm
- 21kg/m
- Cross-sectional areaA
- 2,680mm²
Strong axis x–x
- Moment of inertiaIx
- 36.910⁶ mm⁴
- Elastic section modulusSx
- 24410³ mm³
- Plastic section modulusZx
- 28510³ mm³
- Radius of gyrationrx
- 117mm
Weak axis y–y
- Moment of inertiaIy
- 0.98210⁶ mm⁴
- Elastic section modulusSy
- 19.510³ mm³
- Plastic section modulusZy
- 31.110³ mm³
- Radius of gyrationry
- 19.1mm
Torsion and stability
- Torsional constantJ
- 29.310³ mm⁴
- Warping constantCw
- 21.610⁹ mm⁶
- Effective radius of gyrationrts
- 24.4mm
Slenderness ratios
- Flange slendernessbf/2tf
- 8.82
- Web slendernessh/tw
- 54.3