list of door components and corresponding definitions that might help in your research and planning.
FIRE RATED DOORS that have been tested by an accredited test house to ensure that they are able to resist the passage of fire for more than 30 minutes. Likewise, 60 fire doors will last at least 60 minutes Or 90 fire door will least 90 minutes same with the 120FD.
A measure of the space between the floor and the bottom of the door.
A bolt that is flush with the face or edge of the door when retracted.