Posted tagged ‘hidden deadbolt’

Door Size Up #5

07/11/2010

This door size up drill is a little different than most of the ones we have posted before. It points out more of a specific lock setup that we find on newer style apartments complexes. These are a great example why it is beneficial to take a look at doors as you walk through them on all the calls we have before the fires. 

You can see that the outside of the door only shows your typical handle and deadbolt setup. However once you open the door you can see that this has a second hidden deadbolt that is only operated from the inside. With a wood frame (as shown) this adds very little extra security due to the fact that the jamb is going to split and probably fail at the same time for both locks. However if this setup is found on a metal frame it may hold up better and add some resistence to the door that is not expected until we start our conventional forcible entry on the bottom two locks. Nothing too out of the ordinary here, just worth noting that they are out there and that we should always have plan A, B, C and so on.

Maybe the most important thing to notice about this type of lock setup is what it provides you for search information. This is typically found on apartments that have one door that is used for egress. If we force this in a fire and find that the top deadbolt is locked, we may have a real good indicator that someone is inside the unit. These locks, like security chains, can give us valuable search information if we pay attention to the details.


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