FIRELOCK® has developed vault chambers with specific ratings for the purpose of protecting the following information and archival assets:

  • Class 350 four-hour rating for protecting paper documents
  • Class 150 four-hour rating for microfilm, computer equipment and historic artifacts
  • Class 125 four-hour rating for computer media, digital records and sensitive server equipment

FIRELOCK® is unique in that all vault chambers are designed with an integrated vapor barrier to ensure that high moisture levels or steam cannot penetrate the vault walls and damage backup tapes, IT equipment, historic documents, business records or other information assets stored within the FIRELOCK® vault.

Eliminating steam or high moisture levels is critical to protecting computer media. UL 72 testing specifications mandate that vault and safe environments must not exceed 125°F (52°C) or a relative humidity above 80% for the duration of the rating within the vault chamber.

Classification and Rating of Vault Chambers*

Fireproof vaults are classified in terms of an interior temperature limit and a time in hours. Three temperature limits are employed:

  • 350°F (177°C)
  • 150°F (66°C)
  • 125°F (52°C)

The time limits employed are 4, 3, 2, 1 or 1/2 hour. The complete rating indicates that the specified interior temperature limit is not exceeded when the device is exposed to the standard fire test for the length of time specified.

The temperature classifications of 150°F (66°C) and 125°F (52°C) further require that interior relative humidity of 85 and 80 percent, respectively, are not to be exceeded for the period of the fire test and cool down period.

After a five-hour endurance test to 2,070°F, the FIRELOCK® vault panel system is immediately exposed to high-pressure fire hose spray to ensure the vault is capable of withstanding not only heat but the fire fighting effects that result in a full structure fire.

*Reference: UL 72 tests for fire resistance of records protection equipment. UL stands for Underwriters Laboratories of Northbrook, Illinois who is a Standard Testing Laboratory.

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