They are designed to restrict the transfer of heat from one side of the door to the other for a specified time span (either 30 or 60 minutes). This prevents the risk of injury and burns from touching the face of a door when a fire is burning on the other side and ensures occupants can exit a building safely.
Temperature rise doors offer a higher degree of protection than fire rated doors, which are only designed not to burn or melt, but do not control heat transfer.
If you want to know more about our steel fire door,wood fire fire door and wood door product, please contact us on alibaba https://dljfz.en.alibaba.com/?spm=a2700.galleryofferlist.0.0.4d611f5deOdayq
