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brcocar 03-07-2011 05:30 PM

deck over concrete pad
Hi Folks,

My spring project is to replace a set of stairs leading to our back door with an 8x8 deck, with stairs. The stairs are on top of a concrete pad and I was hoping to bolts the 6x6 posts to the concrete pad. But when I got my permit the guy said that the concrete can move and it'd be better to cut out a section of the pad and put a footing in. I'd only have to do two footings, but I'd rather not if I don't have to. My question for all of you is, would it be ok if I had a ledger attached to the house and two 6x6 posts bolted to the concrete pad below. Has anyone had experience with concrete pad moving and messing up a deck that was bolted to it? I'll get some pics for a better idea of what I'm talking about...


Bondo 03-07-2011 06:45 PM


Has anyone had experience with concrete pad moving and messing up a deck that was bolted to it?
Ayuh,... If you get Frost,...
Concrete pads, without footers Will move, regardless what it's bolted too...
Or what's bolted to it...

masterofall 03-07-2011 06:53 PM

How many risers on the stairs? Can you secure them to the top and let the bottom float?

Daniel Holzman 03-07-2011 06:56 PM

In my town, the rule is that a deck of any size requires footers to support the columns. A pad is not acceptable. I happen to agree with this approach, the columns hold up the deck, and failure of the column/pad connection could result in collapse, which would be a bad thing.

brcocar 03-07-2011 10:51 PM

So here is the location of the new deck, any other thoughts on building it? I was going to leave the other concrete pads alone, not sure why they are there, but I will be cutting the bottom of the three "pads" and putting two 48" footings... Lord willing.

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