Shear cracks can occur in wood due to the stresses applied, resulting in a separation of the wood fibers along the trunk. These cracks are caused by the shearing forces acting perpendicular to the grain of the wood, leading to damage and potential structural instability. It is important to identify and address shear cracks promptly to maintain the integrity and safety of wooden structures.
A growth crack is more like a type of longitudinal separation in the trunk, often associated with growth stresses.
