It hasn't collapsed under king
"It hasn't collapsed under king sized plank mattress and two sleepers, but the tool-less design leads to poor tightening of included wing nut fasteners. It rocks an uncomfortable amount forward and back with normal body shifting during use. I don't know if this was because of improper assembly (no real directions except for those printed on the box), or poor construction. It is a temporary solution and I will definitely be replacing it, which is a bummer because of the price. Construction is not as sturdy and robust as it looks."



