The immediate query of a person would in general be what is a twin bunk bed? A twin bunk bed resembles to any regular bunk bed, made up of two beds positioned one above of the other. Cherry to get to the upper bed, one will have to utilize a stepladder mounted on the bed structure itself. A bunk bed is commonly used to make most excellent use of a scarce floor space. As an option of having just one person sleep on a certain floor area, two people can share the same space.