Depends on the fire of course but the Fire Protective code, which is essentially the building code, provides for non combustible materials and a good sprinkler system in order for the fire department to declare the building habitable. I'm professionally acquainted with those codes. You're going to have a tough time killing someone by building a fire in a modern or updated building and all federal buildings are either new or updated to the latest standards. It's some of the older commercial buildings that you have to worry about.