I inspected an home yeaterday that was built in th 30’s. It has a poured foundation, steel columns, a steel beam, steel joists. All of it is supporting a lightweight concrete floor with steel mesh under it. The issue is that all of it is rusted and in many areas, rusted steel mesh expanded into the comcrete floor, crumbling it. Do I recommend replacing rusted mesh and deteriorated joists, and patch up the floor where it’s crumbled or I suggest replacing the whole floor? What do you think? Take a look at the pictures.