CHAIR DESIGN 101

mardi 20 mai 2014

At a recent meeting of Obsessive Compulsives Unanimous, where the roll was called and checked 7 times, I was heard to commit to making some chairs! :o

Not just ANY chairs but "something special to match the tables I made for my girls......



the secret project ... near the end of the journey



the problem (sorry, opportunity!) is that these tables were made to be used as a dining table, a breakfast bench, a desk and a hall table and so they are a non-standard height.

I referred to Uncle Google hoping to find formulae for chair dimensions and there are plenty for STANDARD tables ... but not these. So, I was on my own :C



I have the final design and design details all sorted out via my usual process of sleepless nights but I could only confirm the dimensions by making what I have called my ERGONOMIC PROTOTYPE (EP)



20140521_131508.jpg



The EP is wider and higher than the final design but I needed to make it like this so I could adjust it easily while taking it around to various daughters places and getting them to sit at the tables. So far i have confirmed seat height above ground, foot rail height and arm rest to seat dimension.



20140521_131454.jpg



but I needed to experiment with the shape of the back splat and so used this method of sliding blocks and dowels to get the profile right,

20140521_131613[1].jpg



but the final back splats will be vertical so I then tacked some vertical slats to the dowels and gave it repeated bum-in-seat comfort tests. I will refer to the standard formulae for width etc

20140521_135029.jpg



the final bum-in-seat-confirmed-shape is quite subtle with slight concavities above and below the maximum curve. I will now copy this profile and, yup you guessed it, back to Uncle Google to learn how to steam bend!



fletty



PS, sorry about the quality of the pics but, to be honest, I was too lazy to come up to the house and get my real camera?


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