This is essentially a duplicate post of what you asked before, but I'll give you the same response that I did earlier:
Why not make it free-standing? Many advantages, very few disadvantages. I personally like the fact that there will be no rotten ledger boards to replace in the future, and you won't be making holes in your house's envelope for water to get in and cause damage. Leave a small gap at the deck edge on the house side, and your rim board there will likely never rot, either. Having to build an extra beam and install 3 more columns is a small price to pay.
Should you decide to go free-standing, you can make the most of your layout (and build the stiffest deck) by going with 2' cantilevers on both beams and both ends of the joists. Doing that will shorten the effective span lengths of joists and beams, resulting in less deflection under load and less overall "wiggle." Columns will be spaced at 8' c.-c. in each row, beams located 11' apart.
Last edited by BridgeMan; 07-10-2012 at 07:40 PM.