By far the very best choice is CHVG due to the fact that this grade is cut from heart of the log. Upper grade Douglas Fir may be specified as vertical or flat grain. True 3/4″ thickness; S4S, in the following nominal sizes: LMG1X4 (actual 3/4″ x 3-1/2″) Janka Hardness Value: 660. When unspecified, a combination of vertical and flat grain (mixed grain) is shipped. Vertical grain means that the growth rings are parallel to each other on the face of the board and the wood is sawn specifically to achieve that look. Specie: Fir LATIN NAME: Pseudotsuga menziesii OTHER COMMON NAMES: douglas fir, oregon pine. Mixed Grain Fir: Primarily flat grain with some wide vertical grain, Some reddish color as CVG Fir but with non-uniform grain character that stains out beautifully. But do note whether the grain is described as “tight” or “loose.” The tighter the grain, the closer together the growth rings are, creating a more uniform texture and making it easier to work. CVG Doug-fir is quite uniform in appearance, so, seeing before buying isn’t as important as when buying lumber with prominent figure. Very common in older homes where woodwork is stained. Upper grade Douglas Fir is often utilized as flooring, paneling, interior trim, and cabinet work where rich, elegant appearances are desired. Common Thicknesses are 4/4, 5/4, 6/4, 8/4. An evergreen conifer species native to western North America. Clear, Vertical Grain – This is the highest grade of Western Red Cedar. Mixed Grain. The fiber is free from naturally occurring defects such as mixed grain, flat grain, grain … Vertical Grain (VG) Fir. Pieces have a smooth face of decay-resistant heartwood and are free from growth characteristics that affect appearance. Two fairly common grades used in the Northeast are Clear Heart Vertical Grain (CHVG) and Aye and Better (A & BTR).