Rift Sawn Lumber

A board sawn through the heart of a log is called quarter sawn  and the annular rings are 90º-60ºto the face, As the log is further sawn, the ring- to-face  angle will  progressively flatten.  A rift sawn, or rift cut,  board has an annular ring  angle to the face of 60º-30 º.  Rift sawn boards are generally more stable than flat sawn but do not exhibit any quarter sawn patterns.