Do I need a box spring with a Zinus platform bed frame? Updated June 12, 2019 16:44 Box Springs are not required for our bed frames, as our platform beds come with slats. Related articles Will my mattress sit on top of the bed frame or inside the frame? Can I attach a headboard and a footboard to my SmartBase? What is the weight limit for a Zinus bed frame? What bed base is best for my Zinus Mattress? Do I need a box spring with a Zinus Smartbase?