I'm moving a deck footing for an existing deck, the current one is in the wrong location and it's too small. What is the proper depth in Connecticut in order to ensure that it doesn't suffer from frost heaving?
The proper deck footing depth in Connecticut
deckfootings
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Typically you would have the beam sit on top of the posts and use a post tie like this one:
Ugh. Your plan sounds like a lot of work, but seems sound.
As an alternative could you convert this to a freestanding deck? Add post and piers near the house. Install some blocking to replace the crummy ledger you'll soon remove. Pull up your one row of floor boards and chop the deck shy of the wall.
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Best Answer
You need to place the footings deeper than the frost line. Some research says the frost line in CT is around 42" so you'd do well to put the posts down 48".
The city will be able to verify this when you get your permit approved.
Count yourself lucky... In Ottawa, Ontario I had to put them down 60"... and they still heaved one year.