424 SELLING LUMBER 



Lengths. Standard lengths 4 to 20 feet, 5 per cent of 8 

 or 9 feet is allowed in mixed length shipments of "B" and Bet- 

 ter Drop Siding, and in addition 5 per cent of 6 or 7 feet in 

 No. 1 Common, and in addition 5 per cent of 4 or 5 feet in 

 No. 2 Common. 



(The above percentage is allowed in all shipments of mixed 

 lengths, even though the number of feet of each length be specific- 

 ally stated.) 



Grades: A, B, No. 1 and No. 2 Common. 



64. Special. Defects named in Drop Siding are based upon 

 a piece manufactured from 1x6 12 feet, and pieces larger or 

 smaller than this will take a greater or lesser number of de- 

 fects, proportioned to their size on this basis. 



(For Grades of 8-inch and wider barn siding see Sees. 77 

 and 79). (For size see Sec. 116). 



65. "A" DROP SIDING mtist be practically free from 

 defects on the face side and well manufactured. 



66. "B" DROP SIDING will admit any two of the fol- 

 lowing defects or their equivalent of combined defects : Me- 

 dium torn grain, three pin knots, one standard knot, 15 per 

 cent sap stain, 15 per cent firm red heart, small seasoning 

 checks, six pin worm holes, or any one of the above defects 

 combined with one of the following: Three small pitch pock- 

 ets or one small pitch streak. 



67. No. 1 COMMON DROP 'SIDING will admit one 

 standard pitch streak, or one standard pitch pocket or their 

 equivalent, and in addition sound knots not over half the width 

 of piece in the rough; sap stain, firm red heart, slight shake, 

 heavy torn grain, defects in manufacture that will lay with- 

 out waste, seasoning checks that do not show an opening 

 through, a limited number of pin worm holes well scattered. 



Pieces otherwise as good as "B" Drop Siding may have 

 one defect (like a knot hole) that can be cut out by wasting 

 1^2 inches of the length of the piece, provided both pieces are 

 16 inches or over in length after cutting out such defects. 



68. No. 2 COMMON DROP SIDING admits of all pieces 

 not as good as No. 1 Common that can be used without waste 

 or more than one-fourth the length of any one piece. 



