AS4600:2018 Figure D2

[Cmitty]

I was hoping someone could help me interpret Figure D2 from AS4600:2018 with respect to the hx and hy parameters required for the distortional buckling stresses.

Any one have more details or description around this?

Thanks

 

[human909]

hx and hy are simply the x and y dimensions to the centroid of the flange and lip from the corner of the web and flange.

If you understand Figure D2a then D2b becomes clear. The D2a diagram is a little confusing as it overlaps the cross marker of the shear centre with the lines of the flange and lip.