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2. Fire-resistance rating - Wikipedia

   en.wikipedia.org/wiki/Fire-resistance_rating

   This rating is the requirement in data safes and vault structures for protecting digital information on magnetic media or hard drives. Temperatures inside the protected chamber must be held below 125 °F (52 °C) for the time period specified, such as Class 125-2 Hour, with temperatures up to 2,000 °F (1,090 °C) outside the vault.

3. Fire door - Wikipedia

   en.wikipedia.org/wiki/Fire_door

   Fire-resistance rated door, with wire mesh glass vision panel Industrial grade fire door rated to hydrocarbon curve and blast resistance Double fire door immediately after 3-hour fire test inside a 4-hour rated Durasteel wall Double fire door after 3-hour fire test in a 4-hour Durasteel wall, during successful 45PSI (3.1 bar) hose stream test leading to a UL Listing [1]

4. List of fire-retardant materials - Wikipedia

   en.wikipedia.org/wiki/List_of_fire-retardant...

   Fire-retardant materials should not be confused with fire-resistant materials. A fire resistant material is one which is designed to resist burning and withstand heat. An example of a fire-resistant material is one which is used in bunker gear worn by firefighters to protect them from the flames of a burning building.

5. Safe - Wikipedia

   en.wikipedia.org/wiki/Safe

   UL provides a variety of fire rating classifications, 125, 150, and 350 representing the maximum internal temperature in degrees Fahrenheit the safe may not exceed during the test. The classifications come in durations from 1/2 hour to 4 hours in length. The safe is exposed to gradually higher temperatures depending on the duration of the test.

6. Gun safe - Wikipedia

   en.wikipedia.org/wiki/Gun_safe

   A common rating for gun safes is "350-1 hour" or "350-2 hour", which means that when the safe is in a fire, the inside will not get warmer than 350 degrees Fahrenheit for 1 or 2 hours. [16] [20] It has been noted that fireproof safes may be insecure against unauthorized entry. [21]

7. Smokeproof enclosure - Wikipedia

   en.wikipedia.org/wiki/Smokeproof_enclosure

   Smokeproof enclosure. In building safety and construction, a smokeproof enclosure is a type of exit stairwell that has been designed to keep out smoke (and other combustion products) in the event of a fire, so that building occupants may more safely exit the building. [1][2][3][4][5]