Assembling this bed is a bit of a chore. Some of the diagrams are ambiguous, and all those slats...whew! But the finished product is amazing. The full-size frame is rated to bear 500 lbs of sleeping people. This is the only bed I have found so far (except for beds specifically designed for this) that has this high of a weight load. It is more than sturdy. Many grandkids will jump on that bed and I will be unconcerned.