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Cedar Lumber Grades Chart
Cedar Lumber Grades Chart. What we call a 2a soundboard could easily be called a 4a grade soundboard by someone else. Clear siding is graded for smooth face.

A very simplified, condensed overview of the steps for grading a piece of hardwood lumber is as follows: Actual thickness depends on whether the wood was “dressed” (surfaced or smoothed) when it was dry or green. It is often sold in specified lengths for typical construction uses.
The West Coast Lumber Inspection Bureau Divides Western Red Cedar Fence Boards Into Three Basic Categories.
Certigrade® 16″ fivex grading rules; Light framing is lumber 2″ to 4″ (51 mm to 102 mm) thick and 2″ to 4″ (51 mm to 102 mm) wide either rough sawn or surfaced four sides (s4s). Any grade may be rough or surfaced, air dried, kiln dried or “green”.
Sm Is The Width, In Inches And Fractions, Times The.
The coastal forests of b.c. Use categories may be developed based on appearance, structural capacity, suitability for secondary manufacturing or a combination of these. Lmi uses a 4a grading scale for soundboards (2nd, 1a, 2a, 3a, 4a), and because we have been around for so long, many other suppliers use a similar scale.
Western Red Cedar Siding Is Available In Clear And Knotty Grades.
Some species must be processed according to special rules. A very simplified, condensed overview of the steps for grading a piece of hardwood lumber is as follows: Clear siding is graded for smooth face.
Actual Thickness Depends On Whether The Wood Was “Dressed” (Surfaced Or Smoothed) When It Was Dry Or Green.
The lumber grader is an integral part of the lumber manufacturing process. Hardwoods are graded by the national hardwood lumber association. Certigrade® 18″ perfection grading rules;
This Is A High Quality Graded Lumber That Acording To The Wwpa, “Has Many Of The Fine Appearances Of C Select Grade…Is Between The Higher Finishing Grades And The Board Grades As Many Pieces Have A Finish Appearance On One Side, The Reverse Side Showing Larger Or More Numerous Characteristics”.
Certigrade® 24″ royal grading rules; Depending upon size, western red cedar is classified as light framing, structural joists and planks, beams and stringers, or posts and timbers. Here's a chart to help explain the grading system.
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