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

https://blogfreely.net/moenusclkq/residential-foundation-repair-101-3-essentials-before-contacting-pros

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.