Log quality standards and inspection methods vary widely from country to country, and are mainly divided into two categories:
(1) Points: The various defects existing in the log itself, according to the different categories of defects, the size of the defects and the severity of the defects to divide the grades, generally divided into, the use of grade quality standards of the country China, Russia and other countries. Quality standards and inspection methods are generally divided into ten categories: knots, discoloration, decay, insect pests, cracks, defects in trunk shape, defects in wood construction, scars (damage), wood processing defects, deformation defects, etc.
(2) buckle quality: the log itself existing in various different kinds of quality defects, according to the size of the defect, the severity of the defect from the log length or diameter class deducted, and finally each log after deducting the defect size of the volume obtained for the net volume, individual serious defects can also be combined to reduce the quality level, the use of defects buckle quality countries such as the United States, Canada and other countries.
