IR – wide flange (ASTM A6 W)
IR 310x129
IR designation built from the metric W; cross-check with the IMCA Manual.
Dimensions
- Depthd
- 318mm
- Flange widthbf
- 307mm
- Web thicknesstw
- 13.1mm
- Flange thicknesstf
- 20.6mm
- Distance k (design)kdes
- 35.8mm
- Distance k (detailing)kdet
- 42.9mm
- Distance k1k1
- 27mm
- Web clear depthT
- 232mm
- Distance between flange centroidsho
- 297mm
Mass and area
- Mass per lengthm
- 129kg/m
- Cross-sectional areaA
- 16,500mm²
Strong axis x–x
- Moment of inertiaIx
- 30810⁶ mm⁴
- Elastic section modulusSx
- 1,93010³ mm³
- Plastic section modulusZx
- 2,16010³ mm³
- Radius of gyrationrx
- 137mm
Weak axis y–y
- Moment of inertiaIy
- 10010⁶ mm⁴
- Elastic section modulusSy
- 65110³ mm³
- Plastic section modulusZy
- 99010³ mm³
- Radius of gyrationry
- 78mm
Torsion and stability
- Torsional constantJ
- 2,12010³ mm⁴
- Warping constantCw
- 2,22010⁹ mm⁶
- Effective radius of gyrationrts
- 87.9mm
Slenderness ratios
- Flange slendernessbf/2tf
- 7.48
- Web slendernessh/tw
- 18.9