When a logger cut down a tree, he used and undercut to insure that the tree fell in a certain path. In Whitethorn, I remember hearing some old loggers brag they could lay down a tree exactly where they wanted it to land. Usually, they aimed for a spot between standing trees so there was no damage to the other trees making them less fit lumber. The undercut was a wedge shaped cut placed several inches deep on the other side of the tree where the logger was sawing. Without an undercut the tree could fall in any direction including on top of the busy logger.
If you want to view an example of an undercut go to Logging etool: making the cuts
Copyright 2009 Sharon Porter Moxley
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