The 3 things I learned when I had my foundation repaired that shocked me were the difference between helical

https://franciscojbku943.image-perth.org/3-things-you-should-know-before-calling-for-foundation-repairs-a-homeowner-s-guide-6

The 3 things I learned when I had my foundation repaired that shocked me were the difference between helical and push piers, when each is used, and why depth beats count.