The fire door rating is a measure of how long a door can prevent the passage of flame from one
side of the door assembly to the other. Fire doors are usually rated for 20, 45
or 90 minutes.
Fire Door Ratings & Listing Reports:
20-Minute Steel Positive Pressure
20-Minute Steel Neutral Pressure
20-Minute 6'8" Fiberglass
20-Minute 8'0" Fiberglass