assaabloy.com 349 Lockcases Introduction Strike plates The strike plate is a metal plate that is fitted to the door frame. Once the door is closed, the door latch and/or deadbolt extends into the strike plate holes(s) which helps to keep it locked tight as well as protecting the door frame from damage. When the lock has a latch mechanism the strike plate will typically have a lip. The lip assists the latch in retracting as it comes into contact with the strike plate during the closing motion of the door. Higher security locks can be supplied with a security box strike. This includes a flat strike plate with a box attached to the back to provide additional security as well as ensuring no debris gets inside the lockcase. A splinter guard is another accessory, which works like a box strike, but is not attached to the strike plate. This will ensure no debris gets inside the lockcase, however it does not offer additional security. Flat strike plate Security box strike Flat strike plate with lip Splinter guard Considerations for selecting the right lockcase Choose the right type of lockcase Sashlock Mortice sashlocks have a bolt as well as a latch. The bolt can be opened from either side with a key or thumb turn, whilst the latch can be opened from either side using a pair of handles. Escape sashlock Provides single action egress from the inside without the need to use a key. Deadlock Mortice deadlocks just have a bolt, which can be opened from either side with a key or thumb turn. Nightlatch The latch is operated by the cylinder. Bathroom lock Bathroom locks have a latch which is operated by a pair of handles and a bolt which is operated by a thumb turn or handle from the bathroom side. Deadlocking nightlatch The auxiliary snib deadlocks the latch when it is depressed by the strike plate in the closed position. Rollerbolt / rollerlatch A rollerbolt or rollerlatch allows the door to operate in both inward and outward directions or openings. Latch Latches are operated by a pair of handles when the door is closed. Tubular latch Latches are operated by a pair of handles used when no security is required.
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