As others have usually said I would also attach the posts to the joists below the deck. It didn't work on this deck, so we tried these. Every bit is just as reliable and very happy with the install. I had to remove a few posts as they are very narrow. Some posts fit perfectly and some need a little work. That's all you have to do to make posts uneven. Time will tell how outdated they are, but if I were to do another deck project I would definitely get them for the posts.
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