Everything is fire rated. You might not like a rating of zero
with a flame or smoke contribution number off the charts, but it
What rating are you required to meet? Where is the door located?
I think what you are asking is what rating your doors have. Most
solid core (particle board / SCL) flush doors are considered to
have a 20 minute rating if in the proper jamb, of course most
manufacturers make doors on up to 3 hour. Taylor offers a high
end residential metal door that can make 90 minutes.
Keep the whole world singing . . . .
DanG (remove the sevens)
You have to talk to your town. A friend has a rental property that the
doors *became* fire rated after the town told him to paint them with
The *fire* door between my house and the attached garage is a standard
luan interior door with a thin piece of metal nailed to the garage
side. If I had a fire in the garage that door would last maybe 5
minutes but the town said it was ok because somebody nailed a piece of
galvanized steel to it.
You are mistaken about that door to your garage. It will last a little
longer then five minutes though exactly how long a given door will last
under fire conditions in the real world no one can reliably say. The
technique you describe is called a tin clad door. They have a fire
resistance rating of twenty minutes when tested in the laboratory. That
is the same resistance as a single layer of half inch sheet rock. The
use of a tin clad door in such a wall opening is a violation of the
building code in most jurisdictions. All five of the nationally
recognized building codes require a listed door and frame assembly in
any opening in a fire wall. A genuine Kalamein door, which is a fire
door whose solid wood core is covered with galvanized sheet metal, would
carry a laboratory listing mark to indicate it's fire resistance in
minutes. The laboratory label would be installed on the edge of the
door that is in contact with the hinge side of the frame when the door
is closed. A door installed in a two hour wall requires a resistance of
Well we aren\'t no thin blue heroes and yet we aren\'t no blackguards to.
Depends on what hour rating is required.
Where a "fire door" is normally needed, in residential construction, is
between an attached garage and the house. This requires not just a rated
door slab but a rated door system. This includes a metal jamb, door and
Your local building dept will tell you what is required for your
look at the UL label on the door for the rating.
what assembly is required for one dwelling differs for another under
your local building codes.
which rating is required for your application?
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