What state/municipality are you in? Your deck looks great! I would like to make a floating deck in Brighton, NY (Rochester), but I get the feeling these are just not allowed. The cement 4x4 support piers are sold by Home Depot, but the local deck expert said no one ever makes a deck like that. The deck guide I downloaded mentions "free-standing" decks, but these still have conventional deep set posts-in-cement. I would like to build a floating deck like yours over an existing cement patio and avoid post holes. Tomorrow I'm off to the town hall to ask what the rules are. Everything is ripped out and I am stuck! Thanks.