The 3 things I learned when I had my foundation repaired that shocked me included: pier spacing is engineering
https://angelofcqv518.quillnesty.com/posts/3-things-smart-homeowners-do-before-calling-a-foundation-repair-company-2
The 3 things I learned when I had my foundation repaired that shocked me included: pier spacing is engineering, not guesswork, and fewer deep piers can beat many shallow ones.