ELECTRO-MECHANICAL LOCKS: MAKING YOUR CUSTOMERS HAPPY

What are the benefits of electrically actuated cylindrical and mortise locks? The door positively latches when it is closed and shut. In fire rated and listed door situations, especially in stairwells, this is a critical requirement, since those doors...


Electro-mechanical access control products are available in different configurations including electrified cylindrical locksets, mortise locks, panic/exit devices, deadbolts, strikes and trim. Each of these devices and configurations provides similar and yet unique locking applications. One of...


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This experience made me realize that there needed to be a better way, one in which a technician who modified a door could do so in the same exact manner each and every time. This better way would be accepted by the local AHJ, thereby making my job and the work of my colleagues much easier and code compliant. It was because of this experience that I designed and eventually had manufactured a tool that could be used the same way each and every time, to drill doors, both rated and non-rated, for wire chases on electrified lock installations. I named the tool the Dor-Cor Drilling Fixture. The tool was tested at Warnock Hersey and deemed to be within the specifications required by the door inspectors. Warnock Hersey issued a letter stating that any technician who modified a door in the field with my tool could have the door inspected and passed by a Warnock Hersey field inspector.

Times have changed. Warnock Hersey was acquired by Intertek Testing Services. Since last year, Intertek has been working with Marray , Inc., to provide a program whereby technicians can drill a fire rated door (wood and mineral core) and apply a label to the door. This program was designated “The Perfect Raceway,” a way for the locksmith to process fire rated doors in the field for electrified door hardware, while maintaining the fire listing of the opening. You can find more information on this program by going to Intertek's program specific website at www.whmark.com/raceway. They have a list of upcoming classes and the requirements for certified personnel who wish to participate in the program.

There are not too many ways you can actually field modify a fire rated hollow metal or wood door for access control locking hardware under code. Typically, if you modify the fire rated frame in the field for electric latch release (strikes), you run the risk of voiding the frame label and thereby, the entire door assembly label, since they are integrated and labeled as a whole. Should you use a door loop for power transfer, not only is it not the best aesthetic choice, but it also might not meet code and standard requirements as called out for in NFPA 80. Any hardware you place in a fire rated assembly, must itself be fire rated for the particular rating of the door. Should you have any questions or concerns on the above, please feel free to call and either speak with me, or any of my staff.

Electrified Trim

For storefront doors and non-fire rated metal pedestrian doors, there are many ways to control access. For a storefront door, you can use a magnetic lock, a shear lock, a bolt lock (not legal in some jurisdictions) or an electrified panic or electrified trim to complete the job. My choice is using electrified trim. The job requires work only on the outside of the door. The trim uses low voltage and a shorter installation time. Metal pedestrian doors can benefit from a simple electric latch panic device where there is minimal modification to the door and the job is completed quickly and efficiently.

The Marray electrically controlled single door panic device is low voltage, fits easily and efficiently onto a standard metal door, can be cut down in the field for narrow doors and is surface mounted. The device has key bypass, thereby ensuring a mechanical means of ingress in case of system failure and is Grade 1 in strength and reliability. The device comes with a one of our patented door loops, so you have everything in the box you need, except your power supply, wire and tools.

Marray offers a select number of electrified cylindrical locksets and can modify most mortise locksets to be electro mechanical. Our name brand Marray CGN series lock is a Grade 1, clutch lever cylindrical and is available in a variety of standard finishes and handle styles. This lock can also be equipped with a REX (Request to Exit Switch) so that an integrated security system with perimeter intrusion detection can be continuously monitoring the entrance points for unauthorized access. The REX is used to shunt the alarm system contact at the door, thereby telling the security system that the door was opened from the inside, rather than being forced from the outside.

Ray Zehrung started locksmithing in the late 1980's, and founded Armored Locksmith in Silicone Valley, Calif., in 1990.He became interested in electro-mechanical locking hardware and in 1995 founded Marray , Inc., a remodifier /manufacturer of most types of electrified locking hardware. Ray Zehrung is founder and president of Marray , Inc. He holds 12 patents in the security door hardware field and has been a guest speaker and instructor to industry groups for over a decade. He can be reached either via email, ray@marray.com, or by calling at 800-500-1449

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