Another way to keep beds together is to put mattresses on top of the spring box in the opposite direction to form a cross. This will keep mattresses together. Always pierce holes before attaching screws to prevent a fragmentation of wood. Thick foam rubber mattresses are advised for platform beds. No box spring is required.
Arrange two double-sized box springs so they are directly next to each other in the long run. Shoot the beds as close to each other as possible. Place two double size mattresses on top of the box springs. Use a double bed bridge to attach mattresses. Slide the contact foam between the beds and wind the straps around the edges of their mattresses. Tighten the straps so that they fit tightly around the sides. Set the foam tops on top of single beds and align the edges. Cover bed with king size bed and a king size blanket.
Tips and warnings
If you get unexpected companies, or only need to ask an additional bedroom with bed sets twin. Instead, you can easily make a big bed of two twins. Using two single beds to produce a king is cost effective and practical because the beds can also be separated for guests who need to sleep alone.