If you run a business or you are in charge of a company, you need to follow particular regulations and meet some requirements for doors, especially when you opt for fire proofing systems. The respective doors must resist both smoke and fire for a particular amount of time, which is basically dictating the rating. Most doors on the market come with specific ratings, between 20 and 180. At the same time, the fire doors may also be used as smoke doors, but not vice versa. Finally, learn how to decipher and read the labels, but make sure you have enough information about the walls too.
The location of your door is directly responsible for the fire rating. For instance, if the door connects two different buildings or two large areas, you obviously need a model with a high rating. You most likely have to concentrate on three hour ratings. On the other hand, the openings that can be controlled from any side of the door do not have to be that powerful.
If you think that the rating is the only factor to take in consideration, you are wrong. You might be surprised to find fire doors with glass windows. It sounds quite unusual, but the glass may be very resistant for specific periods of time and only if it meets various requirements. The wire embedded glass is more popular in such systems, but you can also find ceramic glass. It is more expensive though.
The door resistance to fire is directly proportional with the window size and glass thickness. It also depends on what kind of glass you pick. Other than that, the most resistant units do not usually have any windows.
if the door frame is not fire resistant, all your efforts are in vain. The frames will give up, so both the fire and smoke can get inside. Therefore, the frames are supposed to have a rating too. All these numbers are directly influenced by the wall rating. When you got no idea about this value, ask for the fire codes or get in touch with the local fire department. The wall is the first thing to consider, then you can move on with the door and its frames. The values for doors and frames can be different.
As a general rule, the hinges are supposed to be made of steel. If you find other materials, forget about them. The reasons to opt for steel are obvious from a few different points of view. First of all, steel is the most resistant non-ferrous metal you can find. It can resist to extremely high temperatures for more than any other metal. Second, steel will retain its original shape for a long period of time, even if under high pressure.
If the hinges distort too easily, the door will most likely lose its properties and cannot be operated like planned. The size of the door also determines the hinge resistance or number of units required.
There are a few other things you should never ignore when interested in a fire proofing system:
A superior latch
A proper hardware
A closer if the door is used too often
Gaskets to prevent the smoke penetration