How to change axis preference of a beam family

[Anonymous]

Hi everyone, 

I modelled this element which is a tunnel stroke with Grasshopper and exported it to Revit.

Those in red are HE steel beams and as you can see from the front view they must be inside the external layer and tangent to the outer edge.
I used the Rhino.inside.Revit tool to export it but Revit places them half outside the edge and half inside, this is because the beam family has the central axis as reference for positioning.

I tried to set these two axes as "define origin" as you can see in the table on the side but nothing changes.

Can anyone tell me if it is possible to change the reference axis for positioning the beam? I mean, can I make sure that when I export the beam it is positioned as I want?

I am just learning these programs so I am not very practical and I do not know all the functions.
I hope someone can help me.

Thank you

[zwebber24]

I'm not familiar with your workflow, going from Rhino to Revit, however... I believe once you're in the Revit environment you should be able to select the steel beams and adjust their geometric position from the properties pallet. Depending on how you have them oriented you may try adjusting the Z or Y justifications. You may also need to play with the offset values to get your beams to sit where you'd like them to.