Hand 



Standard lengths are multiples of two 

 feet, 4 to 24 feet, inclusive, in any manu- 

 facture of Common Boards; in mixed 

 lengths and miscellaneous shipments not 

 more than five per cent of 8 ft. shall be 

 included in No. 1 and No. 2 Common; 

 with an additional five per cent of 4 and 6 

 feet in shipments of No. 3 and No. 4 Com- 

 mon, except by special agreement. 



Grades: No. 1, No. 2, No. 3 and No. 4 

 Common. 



NO. 1 COMMON BOARDS. 



75. No. 1 COMMON BOARDS, dressed 

 one or two sides, will admit any number 

 of sound knots, the mean or average 

 diameter of any one knot should not be 

 more than 2 inches in stock 8 inches 

 wide, nor more than 2% inches in stock 

 10 and 12 inches wide; two pith knots; 

 the equivalent of one split, not to exceed 

 in length the width of the piece; torn 

 grain, pitch, pitch pockets, slight shake, 

 sap stain, seasoning checks, firm red 

 heart; wane 1/2 inch deep on the edge not 

 exceeding 1 inch in width and one-third 

 the length of the piece, or its equivalent; 

 and a limited number of pin worm holes 

 well scattered; or defects equivalent to 

 the above. 



76. No. 1 COMMON SHIPLAP OR 

 D. & M. AND BARN SIDING shall be 

 graded by rules governing No. 1 Common 

 Boards, except as to wane, which shall 

 not be so deep as to extend into the 

 tongue or one-half the thickness of the 

 top lip on the groove in D. & M., or over 

 one-half the thickness of the lap in Ship- 

 lap on the face side. (See Sec. 25.) 



GROOVED ROOFING 

 Sizes of Grooved Roofing. 10 and 12- 

 inch S. 1 S. & 2 E. shall be worked to 

 13/16 by 91/2 and 11^ inches. 



Size of Groove to be i/^-inch wide, 1/4- 

 inch deep and located 1-3/16 inches from 

 outer edge of the groove to edge of board. 

 (See cut on page 47.) 



Standard lengths are multiples of two 

 feet, 4 to 24 feet, inclusive, but lengths 

 shorter than 10 feet shall not be included 

 in miscellaneous or mixed lengths ship- 

 ments except by agreement. 



77. GROOVED ROOFING shall be 

 graded by rules governing No. 1 Common 

 Boards, omitting the pith knots, worm 



holes, splits and seasoning checks that 

 show an opening through. 



NO. 2 COMMON BOARDS, D. & M., OR 



SHIPLAP, GROOVED ROOFING 



AND BARN SIDING 



Sizes. 1-inch S. 1 S. or 2 S. to 13/16; 

 114-inch S. 1 S. or 2 S. to li/ 8 ; li/ 2 -inch 

 S. 1 S. or 2 S. to 1% inches. These 

 thicknesses also apply when S. 4 S. ; Ship- 

 lap, D. & M. and Barn Siding worked to 

 84-inch thick. 



Widths of 8-inch and wider No. 2 Com- 

 mon Boards, shall be not more than 1/6 -inch 

 scant whether rough or dressed 2 or 4 

 sides. Pieces narrower than this should be 

 measured as the next lower standard of 

 width and not reduced in grade. 



No. 2 COMMON BOARDS. 



78. No. 2 COMMON BOARDS, dressed 

 one or two sides; No. 2 Shiplap, Grooved 

 Roofing, D. & M. and Barn Siding will 

 admit knots not necessarily sound; but 

 the mean or average diameter of any- 

 one knot shall not be more than one- 

 third of the cross section if located on 

 the edge, and shall not be more than 

 one-half of the cross section if located 

 away from the edge ; if sound may extend 

 one-half the cross section if located on the 

 edge, except that no knot, the mean or 

 average diameter of which exceeds 4 

 inches should be admitted; worm holes, 

 splits one-fourth the length of the piece, 

 wane 2 inches wide or through heart 

 shakes, one-half the length of the piece; 

 through rotten streaks % inch wide one- 

 fourth the length of the piece, or its 

 equivalent of unsound red heart, or de- 

 fects equivalent to the above. 



A knot hole 2 inches in diameter will 

 be admitted, provided the piece is other- 

 wise as good as No. 1 Common. 



79. Miscut 1-inch Common Boards 

 which do not fall below ^4-inch in thick- 

 ness shall be admitted in No. 2 Common, 

 provided the grade of such thin stock is 

 otherwise as good as No. 1 Common. 



No. 3 COMMON BOARDS 



80. No. 3 COMMON BOARDS, No. 3 

 COMMON SHIPLAP, D. & M. AND 

 BARN SIDING is defective lumber, and 

 will admit of coarse knots, knot holes, 

 very wormy pieces, red rot, and other de- 



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