post #119608

A bunk bed is a type of bed in which one bed frame is stacked on top of another. No box spring is required as the mattress lies on a flat surface, the bunkie (or bunky) board, and may be surrounded by rails. The nature of bunk beds allows two or more people to sleep in the same room while maximizing available floor space for activities.

https://en.wikipedia.org/wiki/Bunk_bed