Refer the Diescraper chapter 3 start elevator, survivor just go in those room and AI the tank.
The example screenshot is on DBD chapter 3
And I found same door on Suicide blitz 2 chapter 3, but you can't close after you open it, the DBD m3 you can close and open.
I guess not only those, maybe need care if other map same door existed.
Example:
Refer the Diescraper chapter 3 start elevator, survivor just go in those room and AI the tank. The example screenshot is on DBD chapter 3 And I found same door on Suicide blitz 2 chapter 3, but you can't close after you open it, the DBD m3 you can close and open. I guess not only those, maybe need care if other map same door existed.