I've removed the top layer of the deck and am trying to decide the best way to remove the floor joists attached to the headers....they are attached a bracket and a nail gun was used...any suggestions would help.
Take a circular saw and cut it up. How you procede will depend on the decks construction and how far off the ground it is. If you can't just look at the deck and see a plan, get someone with experience to help you.
Posting a picture will help.