there is more than one way to get a job done. It really depends on what the building details are, material, condition, the site condition.
It may be possible that for the price of a few chains you can knock some small holes in it, thread the chains, and pull it down safely from a better distance than poking up at it with a pole.
If the structure is conducive to that, you could anchor one end of your chain to a dump truck and then pull on the other with the crawler loader. Go after it like the Australian land clearing guys do.