Just wanted to expand a little on a point I made in the post here: http://averagejakeff.wordpress.com/2011/04/17/learning-lessons-from-others/
In it I described a scenario that firefighters are often faced with and the problems with the solution people often offer.
In the above picture you will see a standard residential door with window panes, and the standard key in knob lock, along with the dead bolt. Most firefighters when faced with this think that breaking the window and reaching in to unlock the door is the way to go.
As you can see with these pictures that this is a double keyed deadbolt. So in order to unlock the door you would need the key on the other side. As you can see the key is absent in this picture. So by breaking the window we have lost the integrity of our door, and have allowed an unrestricted air flow into the fire building. Oh and we are still staring at a locked door. Now what seemed like simple forcible entry job, is taking longer all while the fire is growing.
When we approach a door we simply do not know if the dead bolt is doubled keyed or not, the best course of action is to force these doors conventionally (with the irons) in order to ensure the job gets done right the first time.
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