SELLING LUMBER 427 



Boards 1x8, S. 4 S. shall be worked 7y 2 inches wide; 1x9 

 8 l / 2 inches; 1x109^ inches; lxll10^ inches; 1x1211% 

 inches. 



Sizes of No. 1 Common D. and M. and Barn Siding. Eight, 

 10 and 12-inch shall be worked to ^x7y 8) 9y 8 and 11^ inches. 

 Shiplap worked to ^4-inch thick, face same width as D. and M. 

 and Barn Siding. 



Standard lengths are multiples of two feet, 4 to 24 feet, 

 inclusive, in any manufacture of Common Boards ; in mixed 

 lengths and miscellaneous shipments not more than 5 per cent 

 of 8 feet shall be included in No. 1 and No. 2 Common, with 

 an additional 5 per cent of 4 and 6 feet in shipments of No. 3 

 and No. 4 Common, except by special agreement. 



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



No. 1 COMMON BOARDS. 



76. 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 2y 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 ^-inch deep on the edge not exceeding 1-inch 

 in width and one-third the length of the piece, or its equiva- 

 lent ; and a limited number of pin worm holes well scattered ; 

 or defects equivalent to the above. 



77. 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 Shiplap on the face side. (See Sec. 26). 



GROOVED ROOFING. 



Sizes of Grooved Roofing. Ten and 12-inch S. 1 S. and 

 2 E. shall be worked to 13/16 by 9^ and 11# inches. 



Size of Groove to be ^-inch wide, %-inch deep and lo- 

 cated 1 3/16-inches from outer edge of the groove to edge of 

 board. 



