Can someone identify this part? It's from the page of Home Depot.
It looks like a heavy-duty bracket.
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It only takes a minute to sign up.Sign up to join this community
This is a "tension tie" used both to tie joists to the house through the ledger, and to mount posts on the outside of the rim joists. There are different versions of these but most tie to an inside joist with nails or screws, then to the post (or bracket inside the wall) with a bolt.
Example Simpson version:
And here's one installed, seen from the face of the tie: