Got it, I wasnt sure of I could get away with 8s, if so, yes the more space the better. Will hang off the joint with hangers, Beam outer face will be right at 10 feet.
Edit: Was going 6in because I figure I need a 6x6 support post. Is a 4x14(or smaller if I can find a 12 or 10) with a 4x4...