Long story short, I now have a large treehouse with no tree. Contractors put the tree house on legs/stilts/posts so it would remain after the tree was removed. A neighbor who works in commercial construction stopped by to tell me he thinks there’s a safety issue because of the height and that there should be lumber placed in an X pattern between the posts. I’ve reached out to the company that did the work and they say it is fine as is. We’re now almost a month into a debate that I don’t have the knowledge for.

Does anyone know where I can find information about this? My google search must not include the correct words and my neighbor is dealing with personal issues that make me not want to bother him unless I can’t find the information on my own.

I’m attaching a picture of my “tree”house and another image I found online that does show the X pattern my neighbor indicated should be there.