The Cabin 2 Bunk-Over-Queen bed came missing the top safety rail. No milling was done during manufacturing to provide for mounting. I build a safety rail: 5-1/2″ x 75-7/16″. Used white oak and mounted with two 5-1/2″x4″ oak cleats made from board scraps. These are towards the inside of the bed and mounted on with counter-sunk 1-1/4″ drywall screws.