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UL Fire and Impact Ratings

UL Fire and Impact Ratings Explained

To make it easy for our clients to make sound investment decisions about the best filing cabinets and safes we've compiled this archive to better explain every feature of our FireKing, Meilink, ioSafe and Dahle product lines.  At we have over 35 years of experience working with growing and successful businesses around the world to ensure their vital business records, computer media and data  are stored in fireproof, UL-Rated containers to meet compliance, business continuity and disaster recovery goals.

For more detailed rating explanations you can click here to visit our online directory of rating and independent testing facilities.

When it comes to a buying the best safes and cabinets for your business there are clear advantages to UL Rated safes and files versus imported products that do not conform to North American fire, impact or flood testing standards. It is vital that your backup data and documents be protected to the fullest by a nationally know independent testing facility or lab. 


General Overview of all UL ratings
The Underwriters Laboratories (UL) is the trusted source across the globe for product compliance. A product with an Underwriters Laboratories mark is said to be "UL Listed.” and will bear a metal label that states the appropriate UL fire rating and testing standard. All FireKing files will have a metal label attached to the top drawer. Safes bear these labels on the inside of the door and often on the outside bottom edge.

Installing a safe or file without a UL, ETL, Omega Point or Western Fire Center is often considered to be a waste of time and money. In some cases it can also insurance requirements or federal government compliance regulations including HIPAA, Sarbanes-Oxley (SOX) and other PCI or PHI standards.

UL Fire Ratings
As with all fireproof safes and fire files, a UL listing will give you specific information on the standard of protection the fireproof box or container provides its contents (paper or LTO Tapes, DLT, CD's DVD's or hard drives ) when exposed to fire. Every file, hard drive or safe is subject to various test conditions that will expose all six sides to a raging fire (simulating a real world fire disaster). This is accomplished by putting the file cabinet or safe in a large furnace that heats all exposed surfaces to the temperature conditions specified in the test standard.

Underwriters Laboratories use several listings to evaluate records protection equipment safes, storage and file cabinets:

1. Class 350-rated files and safes protect paper documents (wills, deeds, titles, etc)
2. Class 150-rated files and media safes protect magnetic tapes and photographic film
3. Class 125-rated files and data safes protect flexible computer disks, tapes, DVD’s, CD’s and hard drives from heat and humidity

Not Sure Which Fire Rating You Need?? 

Every staff member at KL Security Enterprises can assist you in determining the level of protection required for your specific situation. Most urban areas only require a one hour fire rating, but most rural areas will need a rating of 2 hours or 3 hours.


UL Class 350 2-hour
View Products Online: FireKing 2 hour files FireKing 2 hour safes  Burglary Fire Safe
The UL Class 350 2-hour fire rating provide a full two hours of fire disaster protection. The safe or file, when exposed to external temperatures up to 1700°, the internal temperature of the produce will not exceed 350° for at least 2 hours. These products are designed to protect paper records with the highest level of protection.

UL Class 350 1-hour
View Products Online: FireKing Files  FireKing Cabinets  FireKing Safes
Paper chars at 400° and burns at 451° (Do you remember the classic book Fahrenheit 451?) A safe or filing cabinet with a UL Class 350 1-hour fire rating means that when it is subjected to external fire temperatures up to 1700°, the internal temperature of the safe will not exceed 350° for at least one hour - a product with this class of listing is designed to protect paper records but NOT computer media (for media protection you can use a MediaVault insert)

UL Class 125 3-hour
View Products Online: Data Media Safes
The best fire safe rating standard available today is the UL Class 125 3-hour fire rating. Only FireKing Safes offer this level of fire disaster security! When the 3 hour safe is exposed to external temperatures up to 1700°, the internal temperature of the safe will not exceed 125° for at least three hours. If you need to ensure the best protection of your removable computer media, CD’s, DVD’s, and external or portable hard drives then this is the best safe to buy.

UL Class 125 2-hour
View Products Online: Data Media Safes
A two hour rated safe is a great choice for the storage of large quantities of tapes and other removable media. Any safe with the UL Class 125 2-hour fire rating means that when exposed to external temperatures up to 1700°, the internal temperature of the safe will not exceed 125° for a minimum of two hours. At 125° F digital data and media can easily be ruined often causing a severe loss to business operations.

UL Class 125 1-hour
View Products Online: Data Media Safes
The FireKing MediaVault and the DS1817 or DS1513 media safes carry the UL Class 125 1-hour fire rating. This means that when exposed to external temperatures up to 1700°, the internal temperature of FireKing safes will not exceed 125° F for a minimum of one hour.

UL Impact Rated
Examples: Impact rated file Cabinets   Impact Rated Safes  Impact Rated Data Safes

Fire disasters often include a structural collapse or building destruction. All FireKing files and most safes have a UL impact rating standard, one more reason FireKing is the best records protection you can buy. The impact rated file or safe is able to withstand a fall from up to three (3) stories or 30 feet. The actual UL test to get the Impact rating means that the safe or filing cabinet it is heated to 1,550º F in a fire testing furnace, it is then attached to a crane and lifted three stories in the air and dropped onto a pile of concrete rubble and bricks, then put back in the furnace and reheated. To to meet the listing requirement, temperatures inside can't have risen above 350 degrees Fahrenheit (well below the charring and burning temperature of paper) and sample testing papers that are left inside the safe or file cabinet mus be readable.

Omega Point Laboratories, Inc.  
Omega Point Labs is a division of Intertek, a for-profit company that tests, certifies and rates fireproof safes including the TL 15, TL 30 and TL 30x6 Meilink high security safes.

Western Fire Center, Inc.