I'm working on some prototypes for a set of bar stools, and I've run into a practical problem that is leading to a philosophical question. Take a look at the latest iteration pictured here:
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I like the overall design (with a few smaller modifications), but there is a wood movement problem: the seat will expand and contract across its width, stressing the joints on the crest rail and front stretcher. I'm not too worried about the front, since the stretcher is about 18" below the seat and the legs are fairly slim. The structure can flex a little, I think, without too much trouble. The crest rail is a bigger problem. There is no rear stretcher, so the rear legs can flex in and out if needed, but the crest rail is stout, and only 8" away from the seat. Eventually, in the fullness of time, either the seat might crack or break the joints on the crest rail.
Now, I know there are different design solutions to this problem (like putting an apron under the seat and letting it float above). But here's my philosophical question: is it OK to take a chance that the chair won't tear itself apart for a long time? I mean, eventually it will be destroyed by fire or neglect or accident (or, most likely, by somebody in the future who finds it ugly or unstylish and throws it out). I usually like to think that anything I build could in principle last forever, if made correctly. But can I go ahead and just hope it lasts long enough?
Thanks for any thoughts,
John