Thanks so much everyone for the advice, it is truly appreciated.
Its alot to absorb so I will ensure to take photos and post here so others can see the direction I took. I like the idea of attaching the welded rod to the rebar structure, which I had not considered before. Thats why I asked, but the pipe with welded in coupling nut sounds appealing also. I will ensure to keep my concrete wet, and will also now call my local concrete company. It might save me the trouble of renting a mixer and getting a pallet of bagged concrete.
Bryanwillman
No not really, the main reason people use a separate deep foundation is to isolate their power hammers thumping from the main shop slab. Therefore hopefully keeping the slab from cracking and or knocking things off shelves and or abusing the structure.
Chris