This may cause it to expand in both width and thickness and even to warp in various ways, including twisting, bowing and cupping. Because the grain goes in different directions, the wood may not dry evenly. One drawback to flat sawn lumber is that it is less stable than quarter sawn lumber. Many people enjoy the patterns of the grain in flat sawn wood, especially in woods like walnut, whose grain can be several beautiful colors. Sawyers spend less time and less effort cutting the boards, which contributes to their low price. Plain sawn wood is less liable to collapse as it dries and produces less waste than other types of cuts. It’s full of pitch, or resin and can be very small or very large. A pitch pocket is an opening between the tree’s growth rings. Shakes are caused by bacteria that infect the trees through the root and cause the fibers of wood that’s produced in the later part of the tree’s growing season to separate. They can be on one surface of the board or penetrate to the opposite side. They’re usually found around the growth ring. Shakes are longitudinal splits along the grain of the board. Shakes and pitch pockets don’t extend through as many boards in flat sawn lumber. The normal round or oval knots in plain sawn boards do not weaken the lumber. They appear as spikes in the board and can make the lumber unsuitable for use. Spike knots are left by branches that are cut either on the bias or lengthwise. Quarter sawn boards might have spike knots that weaken them. Flat sawn timber is less affected by knots. Our sawyers at Timberline Hardwoods find many benefits to plain sawn hardwood besides its aesthetic qualities. This makes for an attractive loop, arrow or cathedral pattern on the face of the board and brings out beautiful figures in the wood. The growth rings meet the cut at an angle of usually no more than 30 degrees, though sometimes the angle is 45 degrees but no more. When a piece of lumber is plain sawn, the cut is made tangentially to the direction the tree’s growth rings. Plain sawn, or flat sawn hardwood is the most common and inexpensive way lumber is sawn.
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