Mike,
Most grading is done by professionals after the timbers are cut roughly to size. Each region of the country has slightly different grading guidelines. Each permit authority has different rules. The grade you need should be specified by your designer/architect and further accepted by a professional engineer in accordance with the regional standards and your permit authority. This precludes the inspectors telling you to take it down because it is not built to the appropriate standard required in your area.
All of these are set to insure you don't build a house of cards.
good luck,
deralte
