I don't see why the plans for this bed couldn't bed adapted for the dimensions used in any other size bed.
I'm trying to replace the doug fir cal. king platform bed that my ex husband cobbled together. It's not beautiful and just a little low for me, but its worked wonderfully.
He built a frame with 2x4's in a lattice on end, He built a top and botmless box 1/2 the width and 2/3rds the length out of 1" plywood, with internal bracing at the corners (he used triangular blocks the height of the box). The box is flush with the head of the bed, centered across its width. He topped it with 1/2 inche playwood, and used a key hole drill to place air holes. I use lined wine crates and baskets underneath for storage. High density foam and futons are best for this.