Quote Originally Posted by mrhappypenguin View Post
As you can see the door cannot open, but it is not glitched.

I know you cannot block a crouched spot without another entrance, but this cade has another entrance that is not a crouch entrance. The cade items can jam and push themselves out of place with enough zombies trying to get in, so the cade is breakable.
It looks like you answered your own question.

However, I'm not familiar with the map.