Please forgive me if what I am about to ask sounds silly. I simply am absolutely ignorant about this issue but I want some feedback. My home was built in 1956. The home has had only tile or linoleum since it was built. We came across some ceramic floor tiles. There should be enough to tile the small kitchen area, step and landing to the basement. (Of course I will measure first to be absolutely sure.) Here is my question. The tiles are 12x12. When I move the boxes around downstairs, they are very,very heavy. I am afraid they will be too heavy for the floor. Is the structure of the house strong enough to hold the weight of all those tiles? I realize the weight will be distributed, but I am so afraid the floor will begin to sag, or the structure is not strong enough to hold the all the added weight. Can you help with some of my fears?