Convergence Q&A

The deadlocking plunger weakness

Knowledge of these aspects of door design is well understood by most locksmiths, but not by enough security practitioners and facility managers. Good advice is to check every building perimeter door and every door leading to critical facility areas and critical assets.

Write to Ray Beranrd about this column at Mr. Bernard, PSP, CHS-III is the principal consultant for Ray Bernard Consulting Services (RBCS), a firm that provides security consulting services for public and private facilities. He is founder and publisher of The Security Minute 60-second newsletter ( For more information about Ray Bernard and RBCS go to or call 949-831-6788.