I have noticed that my Billy bookshelf tends to bend repeatedly under heavy loads. Specifically, I am interested in understanding: Why does the Billy bend more often when heavily loaded?
The shelves seem to sag under the weight, even though the bookshelf is designed for the specified maximum load capacity. Is this due to the materials used, the construction, or are there other technical factors that commonly cause this?
I want to understand the exact causes of this behavior in order to either better distribute the load or consider alternative solutions if necessary.
The shelves seem to sag under the weight, even though the bookshelf is designed for the specified maximum load capacity. Is this due to the materials used, the construction, or are there other technical factors that commonly cause this?
I want to understand the exact causes of this behavior in order to either better distribute the load or consider alternative solutions if necessary.
Domau0 schrieb:
Have you checked exactly how the load is distributed and whether the shelf is placed on a level surface?Yes, the shelf is placed on a very flat surface, and the load is relatively evenly distributed. Still, I notice bending mainly in the middle of the shelves.
liskar schrieb:
Often the permissible continuous load is specified by the manufacturer, but the user can effectively exceed this value through uneven or point loads.That's exactly what puzzles me, since I am not exceeding the weight specifications. Do you think the manufacturers’ ratings are based on optimal conditions?
noamreo schrieb:
Do you think the manufacturer’s specifications are determined under rather optimal conditions?Absolutely! Manufacturers want to sell, so they tend to be generous with their estimates. 😉 Don’t be surprised if reality turns out a bit different. Just spread the weight across several shelves or carry less load, and the Billy will hold up much better.
Another technical note: The bending in the Billy shelf typically occurs due to the lack of crossbars and the arrangement of the support strips. These are usually only attached at the sides, which means the middle of the shelf has no direct support, causing the bending stress to be strongest there.
If you wish, you can increase the stability by adding additional central braces or using stronger shelves. Furthermore, by paying attention to the permissible span length and load distribution, bending can be minimized.
If you wish, you can increase the stability by adding additional central braces or using stronger shelves. Furthermore, by paying attention to the permissible span length and load distribution, bending can be minimized.
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