In Canada, every piece of structural lumber has a CLSAB approved grade stamp placed approximately 18 inches (45 cm) from one end.  The homeowner or builder will need to contact and make arrangements with a CLSAB Accredited Agency ( for the Agency to grade the lumber according to the NLGA grade rule that satisfies the building code requirements.  The Agency will provide a written opinion on every piece of lumber in the structure.  The CLSAB Accredited Agency is restricted to providing a written opinion as grading requires all 6 edges of each piece of lumber to be examined, this is not possible for the lumber in a structure.