IR – wide flange (ASTM A6 W)
IR 920x420
IR designation built from the metric W; cross-check with the IMCA Manual.
Dimensions
- Depthd
- 942mm
- Flange widthbf
- 422mm
- Web thicknesstw
- 22.5mm
- Flange thicknesstf
- 39.9mm
- Distance k (design)kdes
- 64mm
- Distance k (detailing)kdet
- 73mm
- Distance k1k1
- 41.3mm
- Web clear depthT
- 797mm
- Distance between flange centroidsho
- 902mm
Mass and area
- Mass per lengthm
- 420kg/m
- Cross-sectional areaA
- 53,500mm²
Strong axis x–x
- Moment of inertiaIx
- 8,16010⁶ mm⁴
- Elastic section modulusSx
- 17,20010³ mm³
- Plastic section modulusZx
- 19,50010³ mm³
- Radius of gyrationrx
- 391mm
Weak axis y–y
- Moment of inertiaIy
- 49910⁶ mm⁴
- Elastic section modulusSy
- 2,36010³ mm³
- Plastic section modulusZy
- 3,65010³ mm³
- Radius of gyrationry
- 96.5mm
Torsion and stability
- Torsional constantJ
- 21,90010³ mm⁴
- Warping constantCw
- 102,00010⁹ mm⁶
- Effective radius of gyrationrts
- 114mm
Slenderness ratios
- Flange slendernessbf/2tf
- 5.29
- Web slendernessh/tw
- 36.2