I agree with the others. Details are required to answer this question, and since none are supplied, it confirms your over your head. Although it can be a rather simple question for someone familiar with your local building code and structural design, it can be quite dangerous for one not familiar to try. Are you a gambler? Would you let nurse or a GP who has a vague idea of how an operation goes to do a complex operation on you? No, I dont think so. Get some real help.