Three-point locking
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Three-point locking, or a multipoint lock, is a locking system installed in
Near the holes in the top and bottom of the door, some restraining device is provided for the rods to pass through, to prevent them from falling away entirely when in the unlocked position, and thus not inserted into the holes in the door.[3] This consists of either a rubber or plastic gasket fitted into the holes in the door and protruding up or down a short distance, or else a small metal plate with a hole in it welded to the inside of the door through which the rod extends in any position.[4]
Another three-point locking system is commonly used in lockers.[5] This system uses a "Latch Channel" with 3 vertical slots that attach to 3 hooks on the locker frame. The locker handle is attached directly to the latch channel so that when the channel is lifted, it is released from the hooks and the door is allowed to swing open.
Use
Three point lock are also commonly used in wardrobes, like from Hettich[6][7] Single-point locking may provide adequate security for some situations on tiered lockers, as the doors are shorter, and therefore more difficult to force open; however, the taller doors of full length lockers and cabinets are more susceptible to the application of leverage. This is the reason three-point locking is usually found on single-tier lockers, and is certainly highly recommended in cases where it is optional.
This system is occasionally wrongly referred to as three-pin locking. This name is incorrect because only two pins or rods are involved, the third locking point being the latch itself inside the door.
In Australia, a locker or cabinet under certain weight limits cannot be legally used to store firearms unless it uses three-point locking and is bolted to either the floor or a wall.
References
- ^ Nottinghamshire Police’s Pre Crime Unit (8 February 2023). "Security Standards in HMOs & Rented Properties" (PDF).
- ^ "Dreifachverriegelung" (in German). 8 February 2023.
- ^ Flavio R. Quesada (8 February 2023). "Three point lock mechanism".
- ^ Adam (2023-03-20). "Comprehensive Guide to Locksmithing". Retrieved 2023-08-01.
- ^ "Jorgenson Lock Channel Assembly for 72" Door | SchoolLockers.com". www.schoollockers.com. Retrieved 2019-07-15.
- ^ "Archived copy" (PDF). Archived from the original (PDF) on 2018-08-18. Retrieved 2018-08-18.
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: CS1 maint: archived copy as title (link) - ^ "Furniture locks - Do-It-Yourself - Hettich". diy.hettich.com. Retrieved 2019-07-15.