Important Considerations Before Buying a Bunk Bed double Bunk Bed desk Bunk beds are a space-saving option for children's rooms. Some models offer a full-size mattress for the bottom bunk, which provides an extra sleeping spot for guests staying over or sleeping. Some have stairs instead of ladders, which are more comfortable to climb and safer for children. There are also additional features, such as safety rails on the top of the bunk. Sturdy Construction Bunk beds that are strong and durable are vital for families with multiple children living in the same room. They can save space and stop siblings from fighting for the same furniture or other accessories. bunk beds with double on bottom bed doubles are available in a variety of styles, so you can choose the one that is best for your family and budget. But, you must take a few important considerations before buying a double bunk bed metal bunk bed to ensure that it meets your child's as well as adult sleeping needs.