This deck was a disaster waiting to happen. The structural integrity of the hangers and fasteners was compromised.
The corrosion was severe. Robert even sent some of the rusted joist hanger nails. A few of them had lost well over 60 percent of the steel! The bottom of several hangers had holes in them ...
If your deck post sits right on a concrete footer, add a proper post base using concrete ... Pull out and replace rusted or ...