The trick is to use a reference plane and lock the flange of the column to this reference plane.
Let me try and explain.
Put in a reference plane, say, 160 off of grid ( the trick is to PIN the reference plane in place ) and then place your column and align and lock the flange to the reference plane.![](//3.bp.blogspot.com/_WEO55byaZbQ/SU-t33UmMJI/AAAAAAAAAMY/GfeOpU3iUic/s320/pin.jpg)
![](http://3.bp.blogspot.com/_WEO55byaZbQ/SU-t33UmMJI/AAAAAAAAAMY/GfeOpU3iUic/s320/pin.jpg)
![](http://3.bp.blogspot.com/_WEO55byaZbQ/SU-uj88Ci4I/AAAAAAAAAMg/EUnvErNg-mM/s320/pinl.jpg)
![](http://4.bp.blogspot.com/_WEO55byaZbQ/SU-xZLVijUI/AAAAAAAAAMo/1Ro2Kn-u6uI/s320/pin152.jpg)