This manuscript is based on the report "THE RESEARCH ON THE OBJECT TO BE FIRE RESISTIVE AND THOSE LIMITS" issued by FILK. With advancement of the life style recently. People seek for more comfort therefore the aspect of the residence is getting more complex. Meanwhile, the vital and property loss caused fire is getting higher. For the safe of the public welfare, these fire hazard should be controlled by governmental system. It will also be satisfactory if this small opinion could be helpful for the safe.