Radiused window casings - Fine Homebuilding
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Radiused window casings

comments (0) January 31st, 2011 in Project Gallery
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Photo: Drawings by Chuck Miller

Recently, while building a half-circle window, I needed a way to make the casing and interior stops. Instead of transferring the curves from templates onto the stock and then joining these pieces, I used a bandsaw fitted with a wood table, and a circle-cutting jig.

In this project, the interior face of the window jamb had a radius of 21-1/2 in. Since the exterior casing was to act as the outside stop, the inside radius of the casing needed to be 21-1/4 in., allowing 1/4-in. to overlap the window jamb. The casing was to be 2 in. wide, so the outside of the casing would, have a radius of 23-1/4 in. I cut a half-circle with a radius of 23-1/4 in. from a piece of 1/4-in. plywood by drilling a hole near its center and fitting it over a pivot riail (A in the drawing) that was attached to the wood bandsaw table in. from the blade. Oh this pattern I placed three pieces of stock, arranged to avoid short grain, and marked the necessary cuts. Once I was satisfied with the miters, I tacked them to the plywood and ran the pattern with the three pieces attached to it through the bandsaw, again from pivot A. This gave me my outside radius. I then repositioned the hole in the circle-cutting jig to pivot point B, a radius of 21-1/4 in., and ran the pattern through again. This gave me my 2-in. wide casing with the joints already fitted. I saved the waste from both cuts, and used them as sanding blocks for the inside and outside edges of the casing

 

Brian K. Shaw, Johnson, VT 

From Fine Homebuilding 20, pp. 14

 


posted in: Project Gallery, windows, doors

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