It is very easy to identify a fire-rated door. You have to look for the identifying label on the corner of the door. The label should show information related to the door’s certification, minutes of fire resistance, dimensions, quality mark, etc.
The lifespan of a fire-rated door refers to the period where the door still safety purpose it was designed for. That period is definitely relative, as it depends on the sensibility of the used materials...
Fire doors can be classified according to their fire rating, material, or features. In this post, we will try to briefly enumerate and describe the majority of fire doors, if not all of them, that you can find on the market today.