THE MEASUREMENT OF PIECE PRODUCTS 



471 



TABLE LXXI 



Minimum Dimensions op Southern Yellow Pine Poles in Inches — 



Classes 



Defects. Defects in piling are rot, loose or rotten knots, wind shake, twisted 

 grain, checks or other defects which interfere with driving or durability. 



367. Posts, Large Posts and Small Poles. Standard fence posts are cut, 7, 7! 

 or 8 feet long. Dimensions up to 10 feet are termed large posts, while lengths of 

 12 to 18 feet inclusive are small poles; the distinction being based partly on the 

 uses to which they are put. Standard cedar posts may be 2 inches short, and f 

 inch scant in diameter when seasoned, but must be full if green or water-soaked. 



Posts are graded by inch classes measured at top or small end. They will permit 

 knots and other defects which will not weaken the piece for the purpose of a post. 

 Cedar may contain a certain amount of center or pipe rot. White cedar posts may 

 have a sweep of 4 inches. Western juniper and red cedar posts may have much 

 greater sweep, provided it lies in one plane or " crooks one way." 



Post material in round bolts whose diameter exceeds 6 to 7 inches, when not 

 needed for corner or gate posts, is usually split into two or more fence posts whose 

 cross-sectional area will equal or exceed that of round posts of the standard dimen- 

 sions. 



Posts must be cut from live timber and, in white cedar, rot or other defects are 

 permitted which do not impair the strength of the post for uses of a fence post. 



