RE: PVC Pipe boxstand??
I saw a post on this once before. I didn't like it then and still don't. For one you said you are going to cement it and you want to knock it down when your done. You cant take it apart if it's glued.
This stuff has one purpose and should be usedfor plumbing only. Plus all the joints will cost you much more than you think.
If it was a good idea then tree stand manufactures would already be using it.