I am in the process of finishing my basement and have few questions before I nail some wood. I have a ranch house and the main beam(2x12) runs across, dividing the house in half. I would like to use the main beam and build a wall(or partition) under it. Is this OK or "up to code"? The main beam would be inside the wall when I finish it with drywall. Which brings up my next question. Is it ok to attach drywall directly on to the main beam or do I need to build a soffit or wall around it first? Any and all thoughts appreciated. Thanks.