|Diagram from my favorite architect guru - Francis D.K. Ching|
Sure architects supposedly use this and other fancy design ideas (don't forget the Modulor Man!) - but I have yet to work with one who utilized any outside of college and studio. It's really all about eyeballing it and using standard lumber/framing sizes. Anywho, for me though, this worked really well for easily measuring out proportionate arches in cad that could be translated onto plywood. That and I made my math whiz Dad very happy :)
Its perfect! Even our kitty Sophie seams to like it... I think... Next step will be a dry run with some scrap plywood we have then on to cutting out the real thing!