Queen Bed Frame - will support mattress without box springs. This Frame came with a new Queen mattress we bought and was used briefly. It is compact, transportable, folds up in 2 pieces and is then bolted together when you put it up. Frame has cross supports so you can use it on mattresses that don't require box springs for support. The total dimensions when set up are 58" x 78" (29"x78" each)....