100 LOBLOLLY OR NORTH CAROLINA PINE. 



GRADING OF LUMBER. 



All lumber was graded according to the 1911 standard for the inspec- 

 tion of North Carolina pine. The basis of inspection is the best or 

 face side. Stock sizes below 12-inch are 6-inch, 8-inch and 10-inch 

 widths. Other widths are grouped as edge. A pin knot is not over % 

 inch; a standard knot not over 1^ inches; a large knot is over 1% 

 inches. Standard lengths of lumber are 8 to 16 feet, not to exceed 5 

 per cent 8 feet lengths; widths, other than bark strips 3 inches and 

 over. The following is a brief description of the grades of kiln-dried 

 lumber. Air dried lumber admits more stain than kiln-dried; 25 per 

 cent in No. 2 ; 50 per cent in No. 3 ; 75 per cent in No. 4. By stain is 

 meant blued sap wood. This does not affect the strength of the wood. 



No. 1 Grade. This grade includes boards 8 inches and under in 

 width having one side clear of all defects, except 2 small defects such as 

 pitch streaks, and the other side grading up to a No. 2 board. Lum- 

 ber over 8 inches wide may have in addition one small pitch pocket, 

 sound pin knot, or other slight defect for each additional 2 inches of 

 width. (Plate XIII, A.) 



No. 2 Grade. This grade consists of boards with small tight knots 

 on the best side and less than one-sixth of the area of pitch streaks ; the 

 other side grades up to No. 3 or better. Pieces 8 inches in width or 

 under may have 3 pin knots, or 3 small pitch pockets; pieces over 8 

 inches wide may have for each additional 2 inches of width one stand- 

 ard knot, 3 pin knots or 3 pitch pockets or small pitch streaks. (Plate 

 XIII, B.) 



No. 3 Grade. This grade consists of tight knotted boards below No. 

 2, one edge No. 2 or better on the best face, and not to exceed 15 per cent 

 of stain. Pieces 6 inches and over admit sound knots to a diameter of 

 not over y^ of the width of the piece, or other defects such as pin knots, 

 pitch pockets, or pitch streaks ; pitchy boards which would otherwise 

 grade No. 1 or No. 2. No. 1 and No. 2 boards which are pitchy, No. 2, 

 allowing 33 per cent. No. 1, 50 per cent of pitch; No. 1 and No. 2 

 boards having 50 per cent stained surface or firm redheart not to exceed 

 20 per cent are admitted to this grade. (Plate XIII, C.) 



No. 4 Grade (Box). Box consists of sound lumber below the grade 

 of No. 3, containing pin, standard, and large reasonably sound knots, 

 and will admit other knots which do not seriously affect the strength 

 of the pieces; a larger amount of pitchy, stained, or redheart surface 

 than No. 3, or a greater aggregate of knots or pitch pockets than is ad- 

 missible in No. 3 boards. (Plate XIII, D.) 



No. 5 Grade (Culls). Culls consist of lumber lower than No. 4 

 (excepting redheart or box strips), either knottier or with more pitch, 

 which can be used without a waste exceeding 25 per cent and may con- 

 tain 50 per cent of firm redheart. 



