My floor joists are sagging off of the main beam by 1/2” causing the floor upstairs to be uneven only where the end of the joists meet the beam. The joists are notched and sitting on a 2x4 ledger. Some of them have splits coming from where the notch was cut.

I was thinking of lifting the joists level, filling the open space above the notch with wood, and attaching the joists with hangers. I’ve attached a picture of how it looks now.

I want to change the floors upstairs from carpet but need to address this first. Would using the hangers to eliminate the notch be the appropriate way? Thank you.

floor joist


wider view

  • I do not see a 1/2” gap at the top, rather the joist and beam appear pretty even. The extra amount hanging below the ledger appears much larger than an amount that the joist may have opened up from the split - if that is what you are referring to. Is what you are saying upstairs a slow decrease in level over some distance? If so, it's probably the beam itself that is sagging. If the dip upstairs is very localized, then the problem is something else.
    – blarg
    Jan 2, 2023 at 22:30
  • I updated the post to add an image showing the floor upstairs. The high point in that picture is the beam. The drop happens where the joist begins. Jan 3, 2023 at 0:35
  • Does it continue to lower toward the (presumably) outside wall? If so, the issue, if there is one, is there instead (e.g., settling foundation wall). What does it do on the other side of the beam? I don't think of settling or other fatigue modes will generally cause things to go down, not up.
    – blarg
    Jan 3, 2023 at 1:02
  • The only spot on the floor where there’s noticeable sagging is right off of the beam. It does sag on the other side as well though it’s not as pronounced. The joists on that side of the beam are also run shorter than on the side pictured. Most of the sag seems consistent with the exception of one area that is noticeably worse. Jan 3, 2023 at 1:13
  • This is a good closeup of the beam/joist joint, but a wider picture would help, too. IMHO, the notch was cut a smidge too deep, so the end of the joist is sitting too low, and probably has been since installation. The only way to fix that would be to shim between the joist and the floor above, pushing the floor up to flatten it. If you lift the whole joist, you'll create a hump for the rest of its span. The crack is a bit worrisome, but a wider pic is necessary to know how worrisome.
    – FreeMan
    Jan 3, 2023 at 15:17


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