You say that joist run North and South, and load bearing walls run east and west? If This is true, does that mean that if I have a center beam running the length of my house (lets say east and west) the only the walls on my first floor running north and south are load bearing? What if I had a wall that runs east and west directly above this joist? Or am i missing something? I live in a 2 story cape, with a half dormer on the back and dog houses on the front. I am looking at taking (actually I already have) out a wall that runs directly above this joist from the basement. I purchased 3 8 x 8 ash beams to support the upstairs. There will be a 10' openning. Any ideas?