Here’s yet another helpful video by George Vondriska from Woodworkers Guild of America, and in this one he explains how logs are sawn and how different parts of the tree produce different grain patterns. Flat sawn lumber is the most economical way to saw a log and the process produces grain patterns that are wide and cathedral like. Quarter sawn, on the other hand, is more labor intensive and therefore more expensive to buy. Quarter sawn boards have a straight grain pattern, and the lumber is generally more stable than flat sawn. In this video, Vondriska illustrates how this is done by using a slice of a log to show us what’s going on. Enjoy.