Tests for fire resistance of record protection equipment

The afterward classifications may be accomplished if testing in accordance with UL 72.

edit Class 125 Rating

This appraisement is the claim in abstracts safes and basement structures for attention agenda advice on alluring media or harder drives. Temperatures central the adequate alcove have to be captivated beneath 125 °F (52 °C) for the time aeon specified, such as Class 125-2 Hour, with temperatures up to 2,000 °F (1,090 °C) alfresco the vault. The temperature account is taken on the central surfaces of the careful structure. Maintaining the temperature beneath 125°F. is analytical because abstracts is absent aloft that temperature threshold, even if the media or harder drives arise to be intact.

edit Class 150 Rating

This is the appraisement appropriate to assure microfilm, microfiche, and added film-based advice accumulator media. Aloft 150°F (65.5°C) blur is adulterated by the calefaction and advice is lost. A Class 150-2 Hour basement have to accumulate the temperature beneath 150°F. for at atomic two hours, with temperatures up to 2,000°F. (1,093.3°C) alfresco the vault.

edit Class 350 Rating

This appraisement is the claim for attention cardboard documents. Aloft 350°F (176.7°C) cardboard is adulterated by the calefaction and advice is lost. A Class 350-4 Hour basement have to accumulate the temperature beneath 350°F. for at atomic four hours, with temperatures up to 2,000°F. (1,093.3°C) alfresco the vault.