Arizona Hardwood Medullary Ray

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Arizona hardwood medullary ray.

If you look at a tree stump or a cut end of a tree you ll see medullary rays or pith rays as light colored ribbons seeming to radiate out from the center of the tree. 4 4 1 and so on up to 16 4 4. 4 4 1 inch it is a practice among lumbermen to express the thickness of cabinet grade lumber in quarters of an inch. The ray fleck flake or figure of a quarter sawn board is the medullary ray of the log which emanates outward from the center of the log like spokes of a wheel.

These channels radiate from the center of the log like the spokes of a wheel or the rays of the sun. With respect to red spruce medullar features can be quite prominent but apparently this is less often the case as compared to sitka. Air drying ad wood that has been dried naturally to have moisture content of about 18. In cross section the angle of the annual ring tangent to the face of the piece to be between 30 and 60.

3 566 likes 168 talking about this 42 were here. The degree to which this ray fleck is revealed is a function of the angle of the growth rings to the face of the boards. Not a complete drying process. Rift only rift sawn at least 75 of the piece must contain rift characteristics.

Lumber is piled in alternating layers separated by narrow sticks to permit air. Oak has medullary ray cells which radiate from the center of the log like the curved spokes of a wheel. Rift and quarter sawn wood is stable and will only shrink in thickness. Post sep 22 2017 2 2017 09 22t16 21.

The degree to which this ray fleck is revealed is a function of the angle of the growth rings to the face of the boards. Used on oak species this method avoids the prominent flake figure of medullary rays that quarter slicing causes. Where does sitka and red spruce land with regards to prominent display of the medullary ray pattern. A term used when talking about quartersawn hardwoods is medullary ray in simple terms the medullary rays are vascular cells that transmit moisture and nutrients outward as the tree grows.

The ray fleck flake or figure of a quarter sawn board is the medullary ray of the log which emanates outward from the center of the log like spokes of a wheel. Rift sawn wood exhibits less medullary ray or ray fleck while it maintains the same straight grain as the quarter sawn wood. Medullary ray cells run perpendicular to the annual rings carrying sap and delivering nutrients to the inner layers of the tree. This straight grain cut is at a slight angle to the medullary rays in oak to minimize ray fleck flake.

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