CAUTION: Description states 14"...not even close!   If you are looking for storage space, this is not for you.  The clearance to slide a storage tote underneath is actually 9.75".   If you lift the entire bed there is 12" of clearance below the slat support bar.   I am very dissatisfied for the high price paid for an inaccurate description!  The mattress only sits 1/2" inside the frame, so it does slide.  The frame is sturdy & well-made, so I am giving 1 star instead of zero.