what does hd stand for

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The conversion kit does not contain a new mechanism case cover plate.  If a cover plate is desired you would need the Fire or Less Dogging Cover Plate for EL conversion kit and panic cover plate fo...
The letters GD, HD, BD, or BDC should be put after the lock function. EXAMPLE: ND53BD GD = Schlage SFIC core HD = Construction core BD = Less core BDC = Plastic temporary construction core
The solenoids are different.  The current standard EL solenoid and mounting bracket is a one piece unit. The bracket is crimped into the front of the solenoid. This solenoid and plunger has no mech...
When dealing with glass lights in doors, there are three (3) critical dimensions which must be coordinated: Exposed Glass Size (EGS) - the horizontal and/or vertical dimensional size of the vision...
Schlage and Falcon do not offer products that have been evaluated by European Directives (CE).
BAA/ARRA stand for Buy American Act and American Recovery and Reinvestment Act. A brief description of some of the federal requirements can be found in the BAA Catalog on the Allegion...
Country of Origin (COO) information can be found in the Buy American Act (BAA) brochure.
To obtain product certification forms:Download the BAA Catalog on the Allegion website Complete the information requested in the the BAA Catalog with a detailed copy of the prod...
This option is not available as the solenoid is in the mechanism case where the dogging components would go.  An HD-EL solenoid is not available, and Special Dogging(SD) is not an option ...
We offer a couple different HD-QEL options:Hex key dogging (HD) is now available with Von Duprin non fire rated QEL33A/35A/98/99 electric exit devices that were shipped after De...