A lumber inspector, also called a lumber grader, uses visual evaluation and measurements to grade lumber products based on the National Hardwood Lumber Association (NHLA) Hardwood Lumber Grading Rules standards. As a lumber inspector, your overall responsibilities include examining the lumber after cuts for knots, holes, splits, and other defects, measuring the lumber for thickness, length, and width to ensure they meet specifications, and sort the pieces based on grade and wood type. The lumber grades determine the value of the wood for distribution.