I purchased this in a queen size for my 128lb son. He has been sleeping on it since 11/30. I just received a smaller version of it today and when I went to move his bed, I discovered that the entire frame on one side is all bent. The mattress on top of it is now sagging where the frame bent and now I have to buy a whole new complete bed and frame set. This frame absolutely cannot be used without a foundation . Do not think it can be used as a platform bed! Not durable or for long - term use! Maybe good enough for an occasional overnight guest only. An adult of less than 130 lbs should have been able to sleep on this in the way it was advertised without the frame bending the way it did!