They are very flimsy. Our bed weighs 150lbs the bed frame came with 5 really think support that had 2 feet for each poll to screw in the middle. I needed more slates so that I didn’t need a box spring. These came with a lot In the box they here tied together which didn’t work since the bed come with 5. Also they were to long by and inch. We have been making them work but we will need to find  something to support them from the floor to the slats so that they don’t bow down.