This web page is designed to clairify questions that you may have regarding the safety standards that are used by Nationally Recognized Testing Laboratories (NRTL), and how DoorKing vehicular gate operators are designed to meet certain requirements of these safety standards.

You should never install, or have installed on your property, a vehicular gate operator that does not carry the "MARK" of an NRTL such as ETL or UL.  You should also be aware that NRTL's do not "approve" or "certify" products that they test.  Manufacturers that use this terminology are incorrect in its usage.  When a product is tested by an NRTL, and that product is found to be in compliance with the safety standard, then that product is said to be "LISTED" and the manufacturer receives a "MARK" and an "Authorization to Label" from the NRTL.  All DoorKing vehicular gate operators are LISTED by Intertek Testing Services (a Nationally Recognized Testing Laboratory) and carry the ETL Mark.

The standard to which vehicular gate operators are manufactured and tested to is U.L 325 - Underwriters Laboratories Inc., Standard for Safety:  Door, Drapery, Gate, Louver, and Window Operators and Systems.  In addition to the 325 standard, vehicular gate operators must also be tested to U.L. 991 - Tests for Safety-Related Controls Employing Solid-State Devices.

The U.L. 325 Standard has undergone significant revisions over the past several years.  The main purpose of the revisions were to create entrapment protection criteria for vehicular gate operators, and to increase over-all safety of the product.  The revised standard was published September 18, 1998, and went into effect March 1, 2000.  The key issues of the September 18, 1998 revision are as follows:

• Created different "classes" of vehicular gate operators.
• Requires a primary and a secondary entrapment protection device (30A.1.1).
• Defined the different types of entrapment protection devices than can be used for primary and secondary protection in a given class of operator.
• Requires an audio alarm to sound upon two sequential activations of an entrapment protection device not interrupted by an open or close limit device (30A.1.1A).
• Requires a renewed intended input in the line-of-sight of the operator once the entrapment sensing system detects a second sequential obstruction (30A.1.2b).
• Requires slide gates not to move greater than 1 ft/sec (30A.1.19).
• Requires the gate operator to have an integral means for manual operation (30A.1.20).

DoorKing vehicular gate operators have been designed to not only meet the above requirements, but have been designed to far exceed these requirements so that we are providing our clients with the safest vehicular gate operators on the market.  How do we do it?  CLICK HERE to learn more.

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