keep the f*** outWatching the bunker door materialize was especially satisfying after a lengthy design and planning process. This is not a traditional bomb shelter blast door. It's design is unique to the needs of a RECESS.

The door is fabricated from ~300 lbs of steel, and will be reinforced with a combination of stacked plywood and ballistics foam. The exterior surface is a plate made from welded 1.5" angle iron; intended to trap, reflect, and fragment small arms fire (see my bunker door ballistics tests here).

This bunker door opens to the inside, and features a removal hinge to eliminate the possibility of entrapment. Two pieces of 2" square tube steel will lock the door against it's 4" square tube steel frame once the shelter is occupied.
intimidating enemies with your bunker door
The primary goal of this design is intimidation. If a RECESS exists to protect your personal cache of water, food, and essential survival gear then the first purpose of your RECESS door is to discourage entry.

A friend, frienemy, or foe that happens across this door should be inspired by its nightmarish appearance and aggressive surface, and immediately question whether or not they even want to try and enter the space. Notions of firing at the door or attempting to batter it down will be cowed by the apparent impossibility of the task. An actual attempt will prove futile, and a waste of valuable ammunition and/or energy.

Hit the jump for some pics of the final assembly.

door materials
welding cross-brace supports