I have a few bench burners on my second story house. While the dry wall has been replaced with a double layer of Type X 5/8 drywall with off-set sockets I worry the floor. Due to the layout of the house and the room beneth it, adding to the ceiling of the floor below is not ideal. 

The room currently has carpet. I plan on tearing it out and either sparying the wood with Inspecta-Shield, which is effective by raising the flame ignition point up to 2500 degrees F thereby slowing or eliminating the flame ingition. (ie. paper ignites at approx. 350 degrees F, glass at 1800, etc). Or should I line the floor in fire grade ceramic tiles? I have heard that I could line the floor in metal sheets, but I don't think I need to or have the capacity to do so anyway. 

What should I do?