Since our two boys had to share a bedroom and there wasn’t a lot of additional room so I decided to build bunk beds. Knowing that they have to be tough to hold up to the typical boy activities I used 2×6’s for the two bed frames and 2×4’s for the legs and ladders. It just bolts together so it can be moved quite easily and it is also configurable as well. I offset the bunks so the lower occupant didn’t feel like he was in a box plus to make it easier to make the beds the lower bunk is just a foot off the floor thus the upper bunk is maybe 4’ above the floor. They can be taken apart and used as twin beds side by side too.
Our sons are fully grown and off on their own but the beds have found a new home at our cousin’s kid’s house for their children so they have not fallen apart yet!
Everything was made out of pine except the ladder runners which are 1” oak for additional strength. The boxes are doweled together and glued. The base bottoms are made or ¾” plywood and mounted to the rails via a grove and glue as well as tow cross support underneath. A few costs of polyurethane tops it off.