this post was submitted on 15 Oct 2023
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I googled and found this post where they tested a similar setup and it failed at 99lbs at 15cm, which looks way way less than the weights you have (plus you’ve got support on two sides, so only like 50% of the load has less support).
I guess the lesson is that the mortise and tenon is very strong, but pocket screws can support a lot of weight too and that’s good enough!
https://woodgears.ca/joint_strength/pockethole.html