Client Based Grades Our proprietary client based grades are created to fit your precise lumber requirements. The following Alder, Ash, Birch and Maple sections present descriptions of each grade by species in our proprietary grading system.   We created these grades to be able to more accurately supply the exact lumber stock that our furniture, cabinet and pallet customers need. We are constantly updating and improving our grading system to better serve you. Our latest improvement is to modify all of our grades, basing them of National Hardwood Lumber Association (NHLA) cuttings. If you have special needs that you don't see here, please contact our Sales Team. We understand unique applications and will do our best to provide the exact stock mix that you need.