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UL-325
 
Everything you wanted to know about UL-325.

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UL 325 Table
PROTECTION AGAINST ENTRAPMENT
Effective: March 1, 2000


Gate Operator Category

Horizontal Slide
Vertical Lift
Vertical Pivot

Swing Gate
Vertical Barrier (Arm)

Primary
Type

Secondary
Type

Primary
Type

Secondary
Type

Class: I & II

A

B1, B2, or D

A or C

A, B1, C or D

Class: III

A, B1, or B2

A, B1, B2, D, or E

A, B1, or C

A, B1, C, D, or E

Class: IV

A, B1, B2, or D

A, B1, B2, D, or E

A, B1, C, or D

A, B1, C, D, or E

Q: Why UL 325?

A: The primary intent of the standards is to prevent entrapment of persons in automated gate systems, as well as preventing injuries from pinch points. UL 325 is not concerned about the gate contacting vehicles, only the entrapment of people.

UL325 went into effect on March 1, 2000. The UL 325 standard is currently voluntary in most areas, although its provisions could carry the weight of law if they are mandated by a state, local or federal government. (Such action was taken by the state of Nevada in March of 2000. Many municipalities and counties are also currently contemplating the adoption of these standards so contacting the local building departments is strongly advised.)

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Note: The same type of device shall not be utilized for both the primary and secondary entrapment protection means. Use of a single device to cover both the opening and closing directions is in accordance with the requirement; however, a single device is not required to cover both directions. A combination of one Type B1 for one direction and one Type B2 for the other direction is the equivalent of one device for the purpose of complying with the requirements of either the primary or secondary entrapment protection means.


Entrapment protection types:

Type A Inherent entrapment sensing system.

Type B1 Provision for connection of, or supplied with, a non-contact sensor (photoelectric sensor or the equivalent).

Type B2 Provision for connection of, or supplied with, a contact sensor (edge device or the equivalent).

Type C Inherent adjustable clutch or pressure relief device.

Type D Provision for connection of, or supplied with, an actuating device requiring continuous pressure to maintain opening or closing motion of the gate.

Type E An inherent audio alarm.



CLASS OF OPERATION

Residential Vehicular Gate Operator - Class I - A vehicular gate operator (or system) intended for use in a home of one-to four single family dwelling, or garage or parking area associated therewith.

Commercial / General Access Vehicular Gate Operator - Class II - A vehicular gate operator (or system) intended for use in a commercial location or building such as a multi-family housing unit (five or more single family units), hotel, garages, retail store, or other building servicing the general public.

Industrial / Limited Access Vehicular Gate Operator - Class III - A vehicular gate operator (or system) intended for use in an industrial location or building such as a factory or loading dock area or other locations not intended to service the general public.

Restricted Access Vehicular Gate Operator - Class IV - A vehicular gate operator (or system) intended for use in a guarded industrial location or building, such as an airport security area or other restricted access locations not serving the general public, in which unauthorized access is prevented via supervision by security personnel.

 
 
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