The supports on the bottom that go the length of the bed down the middle are very thin hollow sections of steel. I assembled mine and after TWO days, I noticed the bed making noises like a bag of loose metal parts. I look under the bed to discover that the center support has folded near the foot of the bed. I am 180 pounds, and live by myself. I'm not jumping up and down on this thing, and I'm not particularly rough on my belongings. This is unfortunately a poor design. It needs a much thicker support along the center. It's way too much to take apart and return it, so this one is just a wash for me. I will have to replace this with a new bed frame.