Fire doors are an important code requirement
for most buildings larger
than two-family residences. The ratings
of the doors and their components are
specified according to the amount of
time they will hold up in a fire, the
classification of wall opening, the use of
the wall, and the fire rating of the wall
itself.
Proper installation can be a matter of
life or death when a fire breaks out.
Detailed knowledge of code provisions
is required. The following is a brief
introduction to the subject, excerpted
with permission from the booklet Fire
Code Summary published by the Architectural
Woodwork Institute.
It is fairly standard throughout the
industry to install fire door assemblies in
accordance with NFPA 80: Standard