ᐅ What helps prevent deformation of BILLY shelves under heavy loads?

Hello everyone,

I have a somewhat specific issue with my BILLY shelves from IKEA: under heavy load, the shelves noticeably bend, especially in the middle, which of course affects both stability and appearance over time.

My question is: What exactly helps prevent bending of BILLY shelves under heavy load? I mean concrete measures like reinforcements, certain materials, special supports, or other tricks. I have considered adding cross braces or additional center supports but am unsure what is actually recommended and practical to implement.

I look forward to expert tips and experiences—feel free to share specific products or your own solutions.

Thanks in advance!

If the shelves are sagging, reinforcement in the middle usually helps. For example, you can cut a thin wooden board and place it under the shelves. Alternatively, metal brackets can be fixed to the back wall to provide additional stability.

Hey, cool question! :-) I have BILLY myself and know the issue with sagging shelves. My tip: just add a bit of tension! I also screwed small edge strips under the boards. This gives the shelves a bit more support and looks fairly inconspicuous 🙂 Especially helpful if a lot of weight is placed on them.

zartra schrieb:
A reinforcement in the middle usually helps.

This is a common suggestion, but I wonder if it only stabilizes the middle without improving the overall load-bearing behavior of the shelf. What impact do the shelf materials have on sagging? I tend to think that considering alternative or thicker shelves should also be an option, especially for heavy loads. Preventing deformation is likely not just a matter of reinforcement but also depends on the overall structural design of the shelf.

A truly sustainable solution is to equip the shelves with a so-called shadow gap and additionally use cross braces. The cross braces can be made of aluminum or wood; the main thing is that they are sturdy and installed centrally underneath the shelves. This way, the load is distributed more evenly, and sagging is significantly reduced. It is also important that the shelves do not hang freely but are well secured within the side channels of the shelving unit.

Thank you for the tips so far!

A question for the community: How sturdy are alternative shelves made from plywood instead of the original particleboard in BILLY? Is this a good solution to prevent sagging under heavy loads?

And are there any experiences with metal profiles for reinforcement? For example, U-profiles on the underside that act as stiffeners? Or does that become too impractical?

Looking forward to your opinions.