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3

Your problem is there's nothing holding the 4 posts in place. The fix is to attach the shelves to the posts as tightly as possible - they can't just set on the posts. What you've basically done is tried to create a large version of these common steel shelves: If you've ever put one together, the strength and stability comes from the wedge anchors on ...


3

The concern is mostly pullout strength, and not shear. The bulk of the leverage of the shelf pulling away from the wall is above the shelf. Therefore, screws above the shelf carry most of the pullout load. It's unlikely that you will have insufficient shear strength if you use 3-4 screws per standard. My point is that you probably won't need the standards ...


2

As @ JPhi1618 has stated try adding a second clamp on the top of the shelves. Before trying that I would try bolting the shelves to the smaller hinge pin hole. For visual appearance sake I would try either a carriage bolt or a flat head screw that is counter sunk.


1

Yes it would be stronger because you could attach more screws. also if resting on the floor gravity wouldnt pull the bracket downward.



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