Section 2-14-120 - "Dimension lumber" defined; adoption of standards for grading of dimension lumber(a) As used in this part, the term "dimension lumber" means lumber that is at least two inches (nominal) thick and up to but not including five inches (nominal) thick and two inches or more in width.(b) The Commissioner shall require with respect to the grading of dimension lumber that standards shall be in conformity with those which are currently adopted by the American Lumber Standards Committee under the auspices of the United States Department of Commerce.