2K Design Kings Brand Twin Size Metal Bi-Fold Folding Platform Bed Frame Base Mattress Foundation Kings Brand Twin Size Metal Bi-Fold Folding Platform Bed Frame Base Mattress Foundation. The height from the floor to top of the bed base is 14". Height from the floor to the bottom of the bed base is 13.125" off the floor for increased storage space. Replaces the bed frame and box spring. Easy to move and store. The brackets that attaches headboard to the bed are not included.