Metal twin bunk beds – It used to be that bunk beds were automatically double size, but that’s not the case anymore. Builders are now stapling larger beds to save space while giving sleepers plenty of space. You can build two separate beds full and stack them, or make beds as a single unit, just make sure you know the size of your mattresses first. Some manufacturers may vary from standard size
Plans for metal twin bunk beds (as they are often called) are available, but most must be purchased. A good compromise is to check out some of the free plans for double brats and single full-size beds, then combine the best features of both. You can build two separate beds instead of one unit, but construction is more complicated because you have to build two bedside tables and two replaceable footboards.
This requires centering and drilling half inch hole at the top of each bedside corner post, and at the bottom of each footstep corner post. You will want to leave at least two feet headspace for your sleepers, whether they sleep upstairs or downstairs below. Platform beds leave more room for this than mattress-and-box spring combinations do.
You need strong corner posts. They should be at least four out of four or two out of six. Full-scale banks are not much heavier than metal twin bunk beds, but you should always take to the strong side. When you build the rails that frame the mattress, you need to make sure that the “box” forms they are an inch or two bigger than the length and width of the mattress, so that you have space inside the beds. Glue and screw two of the two to the inside of the crossbar, which should be at least two out of six to provide robust support for your mattress. Make sure the slats you use are two of four for strength.