~s~: Where you are heading is into the realm of PEs.
I agree on the pull utilizing the pipe theory for straight pulls, but I hear where you are going on the 'down' type pulls.
Honestly, over many years...I never thought about it, and can say it never was an issue.
As to the structure being capable of handling the added weight...leave that to the Architect, or structural engineer types. And...good old common sense!
