Posted tagged ‘homemade locks’

Door Size Up #8


Door number 8 is found on the backside of a 1 story wood frame strip mall, this specific occupancy is some type of ethnic food market. Take a look, run down our key size up points, and see what you think.

We gave you the construction and the occupancy, what else do we see?
1. Metal frame/jamb
2. Commercial metal door
3. Primary Lock is a key in the knob with a latch guard
4. Secondary Lock- Typical deadbolt with latch guard
5. We also see carriage bolts that are in a typical pattern of a slide bolt but an unusal size of the pattern. It is much larger than normal. This pattern is big enough that if we are not paying attention we may mistake it as a drop bar mount or some other type of alternative lock.

To be fair I want to point out that this interior picture is a different door than the exterior picture. Not by much, they have the same locks one is just lacking the latch guards and if you look at the bolt patterns, one of the slide bolts is set closer to the jamb. These were both on the same occupancy I just could not find the interior picture of the door with latch guards. Regardless it does not matter for the sake of the drill.

Taking a closer look at this  slide bolt we can see how significant of a throw this door has. Most slide bolts only make it into the jamb an inch or two at the most. This one looks to be 4 inches or more. That would mean unlike the typical slide bolt this will not only go into the metal jamb but all the way into the wood framing for the door. We will probably start to realize this upon attacking this door with the irons. If we determine we cannot defeat this slidebolt with the irons in a decent amount of time we must look at our other ways of attacking this setup.

The latch guards, key in the knob, and deadbolt will be fairly easily and quickly defeated by the irons with tried and true techniques. If the slide bolt is not defeated by way of the conventional techniques on the jamb, we have numerous ways of defeating the carriage bolts either by irons or the saw that will disable this bolt completely.

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