Sturdy metal frame: made of strong steel construction with a black powder coat finish. Lower bunk weight limit: 330 lb. Upper bunk weight limit: 225 lb.Safety rail: high guard rail going around the top bunk provides maximum safety so you don't have to worry about your little one ever falling or getting trapped between the wall and bed. An opening at the top of the ladder for ease of access. Separate into 2 beds: the bed is an ideal space-saver for a growing family, which provides kids freedom and space to host friends and also offers a sleeping solution for an older child and younger sibling that share bedroom space. If you move into a bigger home or your needs change, you can split the bunk into two individual beds on your needs. Easy to assemble: each order comes with a clear and detailed assembly instruction guide and all necessary tools are provided to get your bed assembled in no time. No box spring is needed, mattresses can be put on the slats directly.