Board Thread:General Discussion/@comment-24041796-20131019024803/@comment-24041796-20150611003429

The door doesn't have the same blast resistance as the bricks, therefore you WOULD be capable of destroying it with Dynamite or Explosives (Item).

Though, because of it still being key-locked, it would not drop, as it would 'drop' as a locked door. And since 'Locked Lihzahrd Door' or whatever it'd be called, isn't an item, it would vanish.

The only way to actually get the door is to unlock it and then break it, then you may get the door. I think you can also make Lihzard Doors with the Lihzahrd Furnace.