DRP
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# Posted: 19 Apr 2026 01:31pm - Edited by: DRP
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This is a stack of planks? I think that will take some pics and more construction info.
If the question is broken down to, "Will a 50 lb shelf hanging on a 16' piece of lumber stood up edgeways, want to twist that piece of lumber?" Absolutely, the desire to twist is there. What is resisting that desire to rotate?
As the span gets shorter the ability to resist that twisting is stronger. Is there a door or window buck making the horizontal log span shorter there. Is the shelf at midspan of a long timber or near a corner or buck that helps resist rotation. How wide are the planks and are they connected together by tongue and groove or splines, or, something to make the planks on either side share that torsion load.
Or, If the glasses start to slide, unload the shelf. Hmm, you can cleat to one log but have an unattached sliding leg that extends down past the next log edge but is free to slide.
Or, another way to think about design as affecting loading the wall, put the load in shear as much as possible. Securing a shallow cabinet by the top rail tightly to an upper course of logs, with the shelve(s) hanging down below. The load is hanging in shear much more than rotating.
Edit; below are a couple of thumbnails of shelves, the top hung one has less torsion on its mounts than the cantilevered shelf.
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