The Madison twin-over-twin bunk bed features double bolting bed rails, two rail height settings and a modular design that can be dissembled for two separate beds. Frames are constructed from poplar wood solids and birch veneers with a Natural White painted finish, and feature rectangular and arched motif raised panels. When one sibling begins to outgrow the bunk, an extension kit is available for order (-8140) that extends the bottom bunk from twin to full size. Additionally, the bunk is designed to accommodate both the trundle drawer and underbed storage units from the same collection for consolidated, space-saving storage area. The bunk includes guard rails and a ladder that can be installed at either end or either side. The top bunk is built to support a maximum weight of 350 pounds.