David Bolton Classroom Lockdown Function Timing: Why a Mis-Timed Cylinder Defeats the Whole Lockdown Strategy What This Article Covers -- and Who It Helps This post explains what cylinder timing means on a classroom-function lockset, why a timing error causes the lock to fail precisely when a lockdown is call... classroom security cylindrical locks lock function lockdown hardware school door hardware Jun 28, 2026
David Bolton Commercial Lock Functions Explained: Mortise, Cylindrical, Deadbolts, and Outside Exit Trims What Are Lock Functions and Why Do They Matter? A lock function describes exactly how a door behaves from both sides: who can enter, who can exit freely, and under what conditions a key or credential ... classroom security commercial door hardware egress code compliance lock functions mortise locksets Apr 19, 2026
