Plain sawn, also commonly called flat sawn, is the most common lumber you will find. The annular rings are generally 30 degrees or less to the face of the board; this is often referred to as tangential grain. The resulting wood displays a cathedral pattern on the face of the board.
A series of horizontal cuts above the heart, vertical cuts through the heart followed by horizontal cuts below the heart.
Typically, high stressed smaller diameters are preferably sawn through this method. Small logs usually represent a very dense timber. If positioned correctly crook can be significantly reduced.
Yellow represents plain sawn boards.
Purple represents the recovery cuts at each corner.