I would like to remove a wall between my bedroom and the one next to it. I also would like to bring the door down 3' in the hall. This would enlarge the bedroom from 12x11 to 12x14. The room next door is only 9x7 and I would turn it into a closet 6x7. How do you tell if a wall is load bearing, and if it is load bearing does that mean you have to put in steel beams. Thanks.