Use the At Architectural Columns tool to snap structural columns to the center of architectural columns in a plan view.
Where is it?
 Build panel
Build panel Column drop-down
Column drop-down 
  (Structural Column)
 (Structural Column)  Structure panel
Structure panel 
  (Column)
 (Column)  Multiple panel
Multiple panel 
  (At Columns).
 (At Columns). 
The structural columns snap to the centers of the architectural columns.
 Multiple panel
Multiple panel 
  (Finish) when complete.
 (Finish) when complete.