Buying a Bunk With double bunk Bed Desk Bed A bunk bed that has a double bunk bed desk bed could save much space in a child's bedroom. These beds are ideal for playing and sleeping by children. They can also be utilized by adults during guests visit. A twin-over-full-full bunk bed is a great option for siblings sharing the bedroom. It can also accommodate an additional full-size bed in the bottom bunk for guests. Sturdy construction Solid bunk beds for adults are designed to be able to withstand the weight of adult sleepers. Look for frames that are rated to support at least 500 pounds on each mattress and meets entrapment hazard standards. Make sure the frame is made from thick materials that can withstand normal wear over time. If you are working with limited space, you should consider bunk beds that have a full-size bottom bed and twin tops in order to save space. They can be fitted with standard twin mattresses and come in several paint finishes.