The 3 things I learned when I had my foundation repaired that shocked me included: pier spacing is engineering

https://elliottruuz068.evergrovio.com/posts/homeowner-guide-3-things-to-know-before-calling-for-foundation-repairs

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.