Save time and clicks by inputting the beam prior to setting the supporting posts. By default a post will attempt to set its top elevation (link) to the nearest linkable object above.
If the column is added as a support before there's a linkable object above, the default behavior is for the post to link to the Level Top.
If the linkable object (beam) is added first, then the posts will naturally link to the bottom of the linkable beam above.