Yaheetech Heavy-Duty Platform Metal Bed Frame/Mattress Foundation- in Twin, Queen, King (King) The SmartBase eliminates the need for a traditional box spring and bed frame Folds and unfolds quickly for easy setup and storage Tough iron construction with high quality craftsmanship 13 inch under-bed clearance for storage Bed frame provides solid support for up to 1100 lbs. of evenly distributed weight