The answer is, it depends. Some trees have shallower trunks than others. The overall guideline is the fact that a white oak trunk goes further than a sycamore’s, plus a sycamore trunk goes further than the usual cottonwood. Beyond that, your local arborist can estimate the depth in the trunk https://elliotyyyyw.thekatyblog.com/1968319/fascination-about-tree-cutting-service-near-me