Definition and Functionality of Three-Point Locking
– Three-point locking is a system used in cabinet or locker doors to enhance security.
– It allows the top and bottom of the door to be simultaneously secured.
– Two long steel rods are attached to the lock on the inside of the door.
– When the lock is turned, the rods move vertically, immobilizing the top and bottom of the door.
– This system greatly increases the security compared to single-point locking.
Components of Three-Point Locking
– The steel rods attached to the lock extend vertically upwards and downwards.
– The ends of the rods move through small holes in the flanges at the top and bottom of the door.
– The rods then move into holes in the metal surrounding the door, effectively immobilizing it.
– A restraining device, such as a rubber gasket or metal plate, prevents the rods from falling away when unlocked.
– This ensures that the rods are always inserted into the holes in the door.
Three-Point Locking in Lockers
– In lockers, a different three-point locking system is commonly used.
– It utilizes a latch channel with three vertical slots that attach to hooks on the locker frame.
– The locker handle is directly attached to the latch channel.
– Lifting the channel releases it from the hooks, allowing the door to swing open.
– This system provides secure locking for lockers.
Advantages and Recommendations of Three-Point Locking
– Single-point locking may be sufficient for tiered lockers, but taller doors are more susceptible to leverage.
– Three-point locking is usually found in single-tier lockers and cabinets.
– It is highly recommended for cases where it is optional.
– In Australia, lockers or cabinets used to store firearms must have three-point locking and be bolted to the floor or wall.
– Three-point locking provides enhanced security and prevents unauthorized access.
References
– Nottinghamshire Police’s Pre Crime Unit provides security standards in HMOs and rented properties.
– Dreifachverriegelung is a German source discussing three-point locking.
– Flavio R. Quesada’s work explains the mechanism of three-point lock.
– ‘Comprehensive Guide to Locksmithing’ by Adam is a valuable resource.
– Jorgenson Lock Channel Assembly for 72 Door is a reference from SchoolLockers.com.Sources: https://en.wikipedia.org/wiki/Three-point_locking
