[JayPeaEm]

I've heard those trap doors referred to as leichenluke

Many of my older neighbors said pre-1990, these bunkers were used in a drill and everyone realized how cramped things were; I believe they've been retrofit for far less occupants now.

[roel_v]

Oh I've often thought about what it must be like to live in there in the case of an actual war. There were 3 or 4 rooms with bunk beds, 20 or 30 sleeping spots in each; one common room, not much bigger than each if the bedrooms; the kitchen, and bathroom/washing area. It would be horrible being locked up with 100 others in there for months on end.