Bunk Bed - simple construction, tricky attachment of stacked beds
I am in the process of building a bunkbed for my son. I am basing my build on the design in the attached image as it looks simple and solid. I am building it as two separate, stackable beds. The posts (vertical supports) are made of 1 1/2 X 2 1/2 stock and I am in a quandary about this: how do I fasten the two units together. A dowel inserted into the bottom/top of each post seems like a fair solution, but might not be as solid as something that actually fastens the two units together. One design I came up with is a sort of keyhole in top/bottom of each post with an allen screw and nut in each, pulling the two sides together but this seems somewhat unsightly. Anyone have any other ideas? Thanks so much for any thoughts!
St Paul, MN
Here is a link that might be useful: My design based on this bunkbed