Here is a column I built to display art, vase, bust or whatever. The client never paid up, so now it sits in my shop. The other picture is a cutoff from from another column. I outlined the birds mouth cut with a pencil for clarity. It’s built up from long identical planks that get dual 45 degree cuts on one edge. The other edge is left at 90 degrees. Cut 8 indentical pieces and do a glue up, securing and clamping with band clamps or surgical tubing (stretch the surgical tubing tight to apply clamping pressure). The advantage of the birds mouth over a simple bevel edge is that it won’t collapse when you apply clamping pressure, it indexes in the birds mouth. Let dry and mount the column on a lathe and turn it until it’s round. The top to my toolbox is built with this same method. There you go, this method has been around for a long time but I simplified it so that it can be made with just a table saw! Hope this helps!
Hammertimejohn