It has been brought to our attention that there have been a growing number of instances at hotels where an electronic key lock's vulnerability has been exploited and thefts (primarily laptops) have occurred.

The perpetrators have found a way to gain access based on knowledge of construction, hardware and lock technology. Door and Hardware Systems Inc.

Consultants and manufacturers of patented security hardware and sealing systems for smoke and sound. Products address related factors on the opening, closing, latching, sealing, and securing of a door. One must understand the relationship of the wall construction, type of frame, machining of doors, types of hinges, closers, frame seals, thresholds, door bottoms, and locksets before one can appreciate why one might have a problem with the locking and securing of an opening.

Contact: Robert RissoneTEL: 585-235-8543FAX: 585-235-0431
e-mail: Website:
Call or E-mail DHSI for questions and other products to help secure an opening and other security related products not shown here.

Go to the internet URL and type in the following hidden links not shown on the website:

  1. Download a 10 page report on what security problems to look for when inspecting guest entry locks, doors and frames. It describes common failures associated with locks one might think are secure. It also describes how gasketing drastically affects the latching and securing of the door. A recap survey page can be used by maintenance and housekeeping personnel.
  2. Describes security brackets for thresholds that prevent spreading of a frame at the bottom. Used mainly on refurbishment and new construction. To understand the threshold, e-mail DHSI for architectural details on how latching, sealing and securing are related to each other. Air for bathroom fans and some p-tac wall units can potentially keep the door from latching and securing. Ask for details on how to accomplish both from DHSI with the "AMU" option.
  3. Describes one of the most current methods of entering rooms. Contact DHSI for a list of methods to retrofit existing frames to prevent this technique. Ask for recommendations for details to specify on new construction.
  4. Describes the expected loss in sound rating caused by gaps.
  5. If you have questions on hinge bind, lock bind, excessive torque on levers. Contact DHSI for 2 copyright illustrated forms (Installation Checklist and New Construction).
    a. Inspecting for minimum industry standards for clearances
    b. Inspecting for machining and installation errors as causes of hinge bind,
    lock bind.
    c. Explains how screws can split rails on hinges and lock edges, ADA
    requirements for closing speeds and so on.
Go to the DHSI web page,, and on their home page and click on:

  1. "Secur-A-Seal" security door bottom that addresses "The Hook Tool". Link to the "Hook Tool" if you are not aware of the issue. Staff should know what to look for.
  2. "Secur-A-Latch" an alternate to the "privacy flip over keeper" used by guests to illegally prop open fire doors or forget and leave the room door unsecured.
  3. "Cush 'N' Seal" frame seals: understand how seals can prevent doors from latching. A link to shows the digital comparison
    of products.
Contact DHSI for architectural specifications and what are already in current codes and standards of NFPA 80, NFPA 101, ADA, AWI, SDI and so on in order to include what specifically should be included for "Field Quality Assurance Criteria". This in itself will affect the performance of the locking and securing.

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Door and Hardware Systems, Inc.
17 Silver Street, Rochester, NY 14611
Phone: 585.235.8543 | Fax: 585.235.0431

© 2011 Door & Hardware Systems, Inc