IR – wide flange (ASTM A6 W)
IR 360x990
IR designation built from the metric W; cross-check with the IMCA Manual.
Dimensions
- Depthd
- 549mm
- Flange widthbf
- 450mm
- Web thicknesstw
- 71.9mm
- Flange thicknesstf
- 115mm
- Distance k (design)kdes
- 130mm
- Distance k (detailing)kdet
- 148mm
- Distance k1k1
- 66.7mm
- Web clear depthT
- 254mm
- Distance between flange centroidsho
- 434mm
Mass and area
- Mass per lengthm
- 990kg/m
- Cross-sectional areaA
- 126,000mm²
Strong axis x–x
- Moment of inertiaIx
- 5,16010⁶ mm⁴
- Elastic section modulusSx
- 18,80010³ mm³
- Plastic section modulusZx
- 24,30010³ mm³
- Radius of gyrationrx
- 203mm
Weak axis y–y
- Moment of inertiaIy
- 1,74010⁶ mm⁴
- Elastic section modulusSy
- 7,73010³ mm³
- Plastic section modulusZy
- 12,00010³ mm³
- Radius of gyrationry
- 117mm
Torsion and stability
- Torsional constantJ
- 466,00010³ mm⁴
- Warping constantCw
- 81,90010⁹ mm⁶
- Effective radius of gyrationrts
- 141mm
Slenderness ratios
- Flange slendernessbf/2tf
- 1.95
- Web slendernessh/tw
- 4.03