The vertical closing bunk bed features a simple intuitive safe system by which one or two beds can be used – already made. Doors butterfly open. System includes sturdy metal ladder. Black metal structure supports slatted and metal mesh foundation. Mattresses included are high density 6″ thick, custom twin sized.” – Vertical Bunk Bed – Euro FlyingBed.
Great idea! Not sure why it costs over $3,000 – but a very inspiring design for the DIYers out there.