I've been unable to find the answer to this question in any book. I have a 10' wall in the middle of my condo that I'd like to put a door in. To do this I will need to remove one of the vertical beams. I think this might be a support wall, however, as these beams are 4x4". My questions are: How can I find out if this is indeed a supporting wall, and do I need to go through the whole prep of removing a support wall if I just want to remove one beam?