Heartshakes are splits occuring from the pith of a log along the path of the medullary rays
heart shake
heart shake
You have to shake the maracas. One of them has a heart on it
Timber can have various blemishes or defects, including shake, checking, wane, and splits. Most are accounted for in normal engineering reviews, but sometimes if the defect is large, it can cause a structural problem.
It is when the wood has been infected by bacteria which causes separation in the rings , it often occurs in hardwoods ,
this could be found in a piece of timber cut from a tree that has been struck by lighting which upsets the grain
Visual grading rules for timber are defined by NELMA - The North East Lumber Manufacturers Association. To grade timber, one has to be certified and be able to judge the quality of the wood based on the number of knots, grain, shake and checking. Click on the attached link to visit NeLMA's site.
emotion
violent storm shaking the living tree
Linden
Star Shakes ShakesShakes are separation of the fibres along the grain developed in the standing tree, in felling or in seasoning. They are caused by the development of high internal stresses probably caused by the maturity of the tree. The shake is the result of stress relief and in the first place results in a single longitudal crack from the heart and through the diameter of the tree.As the stress increases a second relief crack takes form at right angles to the first and is shown as a double heart shake.Further cracks are known as star shakes and show the familiar pattern shown.
shake you down at this moment open your heart livin' on a prayer jacob's ladder