About This File
This is a scanned document of the now defunct Workbench Magazine of this era. Permission was granted by the new Workbench Publication for The Patriot Woodworker community to copy and use the old Workbench Magazine at our pleasure, and for free distribution and re-use.
The professional, and most generally used method of creating patterns for sheet-metal shapes, such as elbows, reducers, square-to-round adapters and the like is to use a geometric layout.
Source: Workbench Magazine March-April 1966