this post was submitted on 23 Jun 2026
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Woodworking
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Three Ikea Kallax and you're golden xD
I dunno. I trust MDF/particle board in compression, but not in suspension or tension. The horizontal bits may not be strong enough, and the backer would really need to be plywood to handle racking forces... which then relies on fasteners into more MDF. It also depends on the weight and (ahem) mileage the bed is going to see.
Kallax is not even mdf 😂 its build like a hollow core door, with carton inside. That said, jump on one in the store, they are surprisingly sturdy
https://thinklightweight.com/wp-content/uploads/2023/10/Hollow-Core-Wood-Products-Think-Lightweight-Foam-Light-Wood-Products-Office-Furniture-Manufacturer-Trade-Show-Booth-Setup-Furniture-Sliding-Door-Workplace-scaled.jpg
I totally get it, but the moment OP decides to get adventurous by attempting to solve the three-body problem on bed made with that, they might get more adventure than they bargained for. Plus, people flop onto and jump on beds all the time, to say nothing of kids. Lastly, some people are just big, making for a situation that can exceed 500 lbs of dead weight (if you're not alone) that isn't evenly distributed. Personally, I wouldn't want the constant distraction of a potential structural failure (however remote) and would overbuild with solid materials just to be safe.