OK - so coopered doors it is! Simple right? Cut some strips of wood, angle the edges that butt up against each other, glue them together and you've got a curved / coopered door! Some square and some angled rip cuts is all it takes to make the strips (which are called staves for some reason). Seems simple enough (sound familiar?).

Now how wide should I make the slats? That's when the engineer part of me kicked in. Arcs, cords, radius, hypotenuse, tangent, sine - ARCTANGENT - ARCSINE! Diagrams - Spreadsheets - Circles and Arrows! On Donner - On Prancer ... !

Daze / days later I had all the math worked out for

- any opening width

- any center off set

- any number of slats/staves

and all in a simple spreadsheet. Enter theopening width,thecenter offsetand thenumber of slats/stavesand let the computer give you theinitial width of the slats / staves,theedge angle- in decimal degrees to four significant digits AND theradius of the circlefor the results. Here's a greatly reduced "Circles and Arrows With A Paragraph On The Back" version of the trig and geometry involved in calculating widths and angles. If you really, really, really want the full size versionand specify that you want CoopMath1.GIF, CoopMath2.GIF and CoopMath3.GIF - 40K, 28K and 36K, respectively.e-mail meIf all this math stuff is intimidating FEAR NOT! There's more than one way to skin a cat.