My dining room has a 18.8 pitch ceiling. I want to hung a chandelier in the center (now it has 4 small pendants by the corners) In order to do so I want to put a beam in the ceiling, which actually would match what the original builders did in the living room. The room is aproximately 14 by 16. I have found a very inexpensive beam that is approximately 11 inches high. Would that be enough highth for that room or should I go with a higher beam. Please, help. I am at a loss.