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Old 11-28-2006, 1:11 PM
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See http://www.6mmbr.com/gunsafes.html

The UL standards are a good place to start.

From the Brown Safe link on that page:
Quote:
How are safes Rated?
The rating systems for safes are defined by construction or performance. Generally, a construction rated safe is lower priced since it's model has not been subjected to an independent lab for testing. Performance ratings are generally ranked by amount of time your valuables are safe when under attack by either fire or burglary. The following tables are greatly simplified, but can give you a general idea of how safes are rated. Make sure to always ask you dealer what the rating is.

Construction Ratings
B Steel, doors less than 1 inch thick,
walls less than 1/2 inch thick
C Steel, doors at least 1 inch thick,
walls at least 1/2 inch thick
E Steel, doors at least 1 1/2 inches thick,
walls at least 1inch thick
ER Safe or chest labeled with:
"UL Inspected Tool Resisting Safe TL 15 Burglary"
F Safe or chest labeled with:
"UL Inspected Tool Resisting Safe TL 30 Burglary"
or
"UL Inspected Torch Resisting Safe TR 30 Burglary"
or
"UL Inspected Explosive Resistant Safe with Relocking Device X 60 Burglary"
G Safe or chest labeled with:
"UL Inspected Torch and Explosive Resisting Safe TX 60 Burglary"
or
"UL Inspected Torch Resisting Safe TR 60 Burglary"
or
"UL Inspected Torch and Tool Resisting Safe TRTL 30 Burglary"

Performance Ratings - Burglary Classifications
TL - 15 Successfully resist entry for a net assault time of 15 minutes when attacked with common hand tools, picking tools, mechanical or portable electric tools, grinders, drills or pressure devices.
TL - 30 Successfully resist entry for a net assault time of 30 minutes when attacked with common hand tools, picking tools, mechanical or portable electric tools, grinders, drills or pressure devices.
TRTL - 30 Successfully resist entry for a net assault time of 30 minutes when attacked with common hand tools, picking tools, mechanical or portable electric tools, grinders, drills , pressure devices and oxy-fuel gas cutting or welding torches.
TRTL - 60 Successfully resist entry for a net assault time of 60 minutes when attacked with common hand tools, picking tools, mechanical or portable electric tools, grinders, drills , pressure devices and oxy-fuel gas cutting or welding torches.
TXTL - 60 Successfully resist entry for a net assault time of 60 minutes when attacked with common hand tools, picking tools, mechanical or portable electric tools, grinders, drills , pressure devices, explosives and oxy-fuel gas cutting or welding torches.

Performance Ratings - Fire Classifications
4 Hour Maintain an interior temperature of less than 150 degrees F and an interior humidity less than 85% when exposed to fire (up to 2000 F) for 4 hours.
3 Hour Maintain an interior temperature of less than 150 degrees F and an interior humidity less than 85% when exposed to fire (up to 2000 F) for 3 hours.
2 Hour Maintain an interior temperature of less than 150 degrees F and an interior humidity less than 85% when exposed to fire (up to 2000 F) for 2 hours.
1 Hour Maintain an interior temperature of less than 150 degrees F and an interior humidity less than 85% when exposed to fire (up to 2000 F) for 1 hour.

UL Labels
If a safe or chest bears the "Underwriters' Laboratories, Inc." , then is model has been fully tested by this highly respected independent laboratory. On the UL label will be a complete performance coding. If your safe has an UL label, make sure to have the sales staff explain the complete label codes to you.
Safes with a UL label are supposed to be built in the same way as the tested examples, thus should perform similarly to the UL testing results.

Doesn't mean non-UL safes are, on that basis only, less secure. Does mean with non-UL you don't really have any good way to tell.
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