Source: Lock Industry Standards and Training
(LIST) Council
UL Fire Resistive Container Classifications
class 125
(n.) A group of UL classifications for
containers that maintain inside temperatures
less than 125 degrees Fahrenheit when
exposed to a fire of specific temperature
and duration. The times and fire temperatures
are:
½ hour 1700 degrees F.
1 hour 1700 degrees F.
2 hour 1850 degrees F.
3 hour 1925 degrees F.
4 hour 2000 degrees F.
class 150
(n.) A group of UL classifications for
containers that maintain inside temperatures
less than 150 degrees Fahrenheit when
exposed to a fire of specific temperature
and duration. The times and fire temperatures
are:
½ hour 1700 degrees F.
1 hour 1700 degrees F.
2 hour 1850 degrees F.
3 hour 1925 degrees F.
4 hour 2000 degrees F.
class 350
(n.) A group of UL classifications for
containers that maintain inside temperatures
less than 350 degrees Fahrenheit when
exposed to a fire of specific temperature
and duration. The times and fire temperatures
are:
½ hour 1700 degrees F.
1 hour 1700 degrees F.
2 hour 1850 degrees F.
3 hour 1925 degrees F.
4 hour 2000 degrees F.
Source: Lock Industry Standards and Training
(LIST) Council
UL Listed
(adj.) Listed in a directory as having
passed specific Underwriters Laboratories
testing.
Source: Lock Industry Standards and Training
(LIST) Council
Unassociated Change Key
(n.) A change key which is not related
directly to a particular master key through
the use of certain constant cuts.
Source: Lock Industry Standards and Training
(LIST) Council
Unassociated Master Key
(n.) A master key which does not have
change keys related to its combination
through the use of constant cuts.
Source: Lock Industry Standards and Training
(LIST) Council
Uncombinated
(adj.) 1. Of or pertaining to a cylinder
which is or is to be supplied without
keys, tumblers and springs.
(adj.) 2. Of or pertaining to a lock,
cylinder or key in which the combination
has not been set.
Source: Lock Industry Standards and Training
(LIST) Council
Uncontrolled Cross Keying
(n.) A condition in which two or more
different keys under different higher
level keys operate one cylinder by design;
e.g., XAA1 operated by AB, AB1. Note:
This condition severely limits the security
of the cylinder and the maximum expansion
of the system, and often leads to key
interchange.
Source: Lock Industry Standards and Training
(LIST) Council
Unibolt
(n.) A single plate of steel used in
place of individual multiple bolts to
lock a safe door.
Source: Lock Industry Standards and Training
(LIST) Council
Unidirectional Cylinder
(n.) A cylinder whose key can turn in
only one direction from the key pull
position.
Source: Lock Industry Standards and Training
(LIST) Council
USB Key
(n.) A hardware key connected to a USB
port.
Source: Lock Industry Standards and Training
(LIST) Council
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