h a l f b a k e r y
Recalculations place it at 0.4999.
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Current doors, being rigid, when against forced entry,
transfers all energy to the jambs, making it easy to bust
the door down.
Solution: a door with a flexible core, coupled with a an
expanded jamb and locking hardware.
(this is for doors that open in (you push from the outside to
in, not pull)).
The core will be a flexible, possible rubberized, material.
The material along the borders will be rigid. Any forced
entry attempts will need to be made to the center of the
door, because of the extended door jamb and locking
hardware. Most of the forces applied will be dampened,
spreading the force out over time, thus making for a
The outer layer of the door need only be a weak veneer.
||Steel door. Steel jambs. Heavy deadbolt lock.
||to a certain extent, doors made with bars, rather than panels work this way. if the door was produced with bars or tubes, and clad in a material that wouldn't distribute the force then the function would be similar. The classic technique is to deliver the blow to the area near the latch so having the door give way there would buy you some time. Essentially the door needs to have an intrusion structure which will dissipate large quantities of energy, even when blows are struck right at the edge.
||Neither am I. It's unclear exactly what is meant by // bust
the door down // but I'd be surprised to see any
conventional security door that can be forced open with
anything short of a large sledgehammer, which would
probably take down this thing as well since it has a rigid
frame. Attacking the center of the door makes no sense;
the weakest point of any door is the latch.
||Well, I liked it. I particularly like the image of a
bunch of guys (for some reason I picture the Anthill
Mob) running at the door with a massive battering
ram and rebounding amusingly.
||I worked in a gas station some decades ago. We had a
break-in one night. The thieves couldn't breach the
door, so they took out a section of the wall.
||Gas station buildings aren't built like Ft Knox. They're
made to be cheap and quick to erect. Some, up into
the 1960s, maybe later, were made from prefab,
preformed steel panels.