The 3 things I learned when I had my foundation repaired that shocked me: push piers depend on house weight
https://canvas.instructure.com/eportfolios/4298998/home/3-things-smart-homeowners-do-before-calling-a-foundation-repair-company
The 3 things I learned when I had my foundation repaired that shocked me: push piers depend on house weight, light additions may need alternate systems, and brackets matter.