flat grain


Also found in: Acronyms.

flat grain

[¦flat ′grān]
(materials)
The grain pattern formed when soft wood is cut so that the tree's annular rings form an angle of 45° or less with the board's surface.
References in periodicals archive ?
The end grain of siding absorbs liquid water much more rapidly than lateral grain (flat grain or vertical grain).
In this study, tool direction was a significant factor when machining the end and flat grain surfaces.
Further analysis found significant differences due to tool wear for the conventionally machined end grain and climb cut flat grain surfaces (Table 3) for samples machined at 18,000 rpm.
In climb cutting flat grain surfaces, increasing the feed per knife had no significant impact on quality (Table 4 and Fig.
On flat grain surfaces, climb cutting produced a higher quality surface compared to conventional cutting.
Both grades will be a mix of vertical and flat grain lumber.
For softwood, this can range through extremes of edge grained (vertical sawn) and flat grained. For hardwood, the terms are, respectively, quartersawn and plainsawn.
Wood Siding Type Footnotes Surface/Coatings Checklist BARE WOOD -- Initial Exterior Coating Cedar (Eastern White & Western Red) Smooth Clear Edge Grained F,N Smooth Clear Flat Grained F,N Smooth Knotty Edge Grained F,N,Q Smooth Knotty Flat Grained F,N,Q Rough Clear Edge Grained F,N Rough Clear Flat Grained F,N Rough Knotty Edge Grained F,N,Q Rough Knotty Flat Grained F,N,Q Redwood Lumber Smooth Clear Edge Grained F,N Smooth Clear Flat Grained F,N Smooth Knotty Edge Grained F,N,Q Smooth Knotty Flat Grained F,N,Q Rough Clear Edge Grained F,N Rough Clear Flat Grained F,N Rough Knotty Edge Grained F,N,Q Rough Knotty Flat Grained F,N,Q Pine (White or Sugar), Fir, Spruce, etc.
"Kiln-dried fir makes a beautifully figured, easily finished interior woodwork for vertical and flat grain." In the western United States second growth Douglas fir is also commonly used for railroad ties because of its properties.
This dweller of the small intestine regularly sheds segments, which look like little, mobile, flat grains of rice, each of which contains about 20 eggs.
DATA REDUCTION -- The data for each of the finish systems were plotted to show performance over the 14-year exposure on each of the three different surfaces (newly planed vertical-grained (NP VG); factory-planed flat grained (FP FG); and saw-textured vertical-grained (ST VG)).