Our rift sawn hardwood flooring is crafted with the most uniform color and grain in the industry. We saw our rift sawn hardwood flooring with a grain angle as high as 74 degrees depending on the log. The higher grain angle creates a more dimensional stable floor and produces a tighter grain. When cutting rift sawn flooring the grain angle will vary slightly from one end of the board to the other over its length.
Rift Sawn cut wood for all purposes is a visual specification for radially cut wood. Rift sawn wood will have vertical grain but no conspicuous ray flecks. The specification is meant for the oaks which have prominent medullary rays. Each tree will vary in the size of their medullar rays and the grain angle at which the ray fleck starts to become noticeable.
A radially cut board features medullary ray or “fleck” perpendicular to the growth rings. Medullary rays are strips of cells extending radially within a tree. The rays serve primarily to store food and transport it horizontally in the tree.
On quarter sawn oak, the rays form a conspicuous figure, sometimes referred to as flecks. The closer the grain angle approaches 90 degrees the more predominate the ray fleck will be extending across the width of the board.
Rift sawn flooring is cut with the growth rings forming angles from 30 to 60º to the board’s surface. As the grain angle decreases away from 90 degrees the ray fleck become less conspicuous and aligns with the grain of the wood.
Industry standards state at least 75% of a rift sawn board must contain Rift characteristics. Rift characteristics as defined by NOFMA are: In cross section the angle of the annual ring tangent to the face of the piece to be between 30° to 60°. Grain lines to be mostly parallel to the length of strips and medullary ray flecks less than 1/16″ wide.