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Octagon Columns Determining the width of staves. January 24, 2005

Question
I need to make some 8 1/2" regular octagon columns and would like to know the formula for figuring the width of the staves.

Forum Responses
From contributor J:
I�m guessing you don�t have AutoCAD.

We could get into how to calculate, sin, cosine and tangents, but the easiest way is to grab a piece of plywood, draw your 90 degrees crosshairs, then draw an �X� at 45 degrees off axis of the crosshairs, use the center point and draw the diameter of the circle and measure the intersecting lines.

From contributor T:
It is always best to lay out your polygons mechanically or by cad, full size.

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