O&MM Fabricator - November/December 2015 - (Page 48)
Changes Coming to
UL 325 FOR GATE OPERATORS
RiCK SEdivY, dooRKiNG diRECToR oF MARKETiNG ANd REGuLAToRY AFFAiRS, ANd ToM dESiLviA,
LiFTMASTER diRECToR oF ENGiNEERiNG FoR REGuLAToRY ANd TEST SERviCES
new uL 325
changes take effect, bringing a series of new
mandates for the gate operator industry.
here's a quick guide to the key modifications.
1. Entrapment-Protection Devices. Gate
operators are required to have a minimum
of two independent means of entrapment
protection where the risk of entrapment
or obstruction exists. A manufacturer
can use two inherent-type systems,
two external-type systems, or an inherent and an external system to meet the
requirement. however, the same type of
device cannot be used for both means
2. Monitoring Required. An external noncontact sensor or contact sensor may be
used as a means of entrapment protection.
however, the sensor must be monitored
once every cycle for (1) the correct connection to the operator and (2) the correct
operation of the sensor. if the device is not
present, not functioning, or is shorted, then
the gate operator can only be operated by
constant pressure on the control device.
Portable wireless controls will not function
in this case.
3. Entrapment Risk Identification. As in the
past, it's up to the installer to examine
the installation and determine where a
risk of entrapment or obstruction exists.
Manufacturers are required to provide
instructions for the placement of external
devices, but they give only examples of
suggested entrapment protection in their
installation manuals. if the installer identifies a risk of entrapment or obstruction, at
least two independent means of entrapment protection are required.
sTARTinG On JAn. 12, 2016,
4. Terminology Change. The terms "primary"
and "secondary" have been removed in
the description of entrapment protection
devices. This was done to emphasize that
all entrapment protection devices are
5. The End of Type E. Type E (audible alarm)
devices can no longer be used for entrapment protection. This change was made
because the Type E device is really a
warning device, not an entrapmentprotection device. Also, all gate operator classes are now required to have an
audio alarm that sounds when two successive obstructions are encountered via
a contact-type system.
6. Access Control Location for Emergency
Use. An exception has been added in the
manufacturer's instructional requirements
for the location of controls that operate
the gate. The instructional requirements
state that these controls must be at least
6' away from any moving part of the gate.
in the new exception, "Emergency access
controls only accessible by authorized
personnel (e.g., fire, police, EMS) may be
placed at any location in the line-of-sight
of the gate."
7. Barrier-Arm Operator Exception. An
exception has changed for barrier-arm
gate operators requiring entrapment protection. The previous exception stated
that a barrier-arm operator did not require
entrapment protection if the arm did not
move toward a rigid object closer than 2'.
The distance has been reduced to 16" so
it more closely aligns with the industrydefined entrapment protection provisions
in ASTM F2200.
48 | November/December 2015 * O&MM Fabricator
8. Gate Operator Class II and Class III
Definitions. The definitions for installation
classes for gate operators were modified.
Class ii now includes commercial locations
accessible to the general public. Class iii
was refined to specify industrial locations not accessible to the general public.
These changes, while seemingly minor,
may affect which gate operator is suitable
for a particular installation location.
Since 2000, gate operators have been
required to have two independent entrapment
protection devices for each area requiring
entrapment protection. The changes listed
here will affect manufacturers as well
For example, manufacturers need to ensure
that a gate operator can detect (1) that each
external entrapment protection device is connected and functioning properly, (2) that a
Type E audible alarm is not one of the required
means of entrapment protection, and (3) that
their instructions have been properly updated.
installers need to understand the new
requirements and ensure that the products are
installed in accordance with the instructions
and local codes. This may include installing
external devices that are new or different from
ones used in the past.
Since external entrapment protection
devices must be monitored, installers need
to ensure that the proper number and types
of devices are installed. This will especially
affect installers who have previously ignored
the requirements to install two independent
entrapment protection devices for each area
requiring such protection.
if you have questions, contact your gate
SOURCE CREDIT: reprinted witH permiSSion of door & acceSS SyStemS magazine
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O&MM Fabricator - November/December 2015