APPARATUS FOR RETROFITTING AN EXISTING DOOR TO PROVIDE A FIRE RATING TO THE UNRATED EXISTING DOOR

摘要

The present invention provides for an apparatus for retrofitting an existing wooden door to upgrade the fire rating of the existing door. The apparatus comprises a door cover steel sheet having a non-combustible insulating coating on an interior surface for covering at least one surface of the door and a lock set reinforcement bracket having a non-combustible insulating coating on an interior surface for surrounding the lock set opening on the opposite surface of the door, the apparatus providing at least a twenty minute fire rating to the retrofitted door.