This deck was a disaster waiting to happen. The structural integrity of the hangers and fasteners was compromised.
"The best way is to use a jack and lift the structure ... Pull out and replace rusted or corroded nails. Joist hangers used ...
Framing anchors come with special nails that are required for use with each anchor to provide the load carrying capacity and avoid eccentricity. Framing anchors, framing hangers, and framing ties ...