Jig for Fitting a Curved Chair Splat
Building a chair with a curved back splat is challenging work, in part because the splat itself is tricky to fit. The tenons at the splat’s top and bottom aren’t parallel or in the same plane with one another. For my Chippendale chair, I simplified the measuring, layout, and fitting of the splat using this jig.
Something similar will work for almost any chair with a back splat, and other curved furniture parts, too.
The jig is two pieces of stock, joined end to end with a hinge joint. The opposite ends are cut with tenons that fit the mortises in the crest rail and the shoe (the piece above the back seat rail). To make the jig, cut the tenons first, then the fingers in the hinge joint. Remember that the jig must be long enough to match the space of the chair back. Slide the fingers…