61 



large and unsound or loose knots, decay or other defects which in the 

 opinion of the inspector may materially impair their strength or dura- 

 bility. 



Htntiylttness. Piles shall have a uniform taper and none with 

 swell or twisted butts will be accepted. Piling shall be so straight that 

 a straight line drawn from butt to tip will not deviate morq than one 

 (1) inch for each ten (10) feet in length; that is to say, a pile seventy 

 (70) feet in length may deviate seven (7) inches from a straight line 

 drawn from butt to tip. Piling with short or reverse bends, or kinks, 

 will not be accepted. 



Tn-ists. No piling with spiral grain will be accepted which has 

 one complete twist in a length of forty (40) feet or less. 



Trimming. Piling shall have all bark and inner skin removed. 

 Knots shall be cut flush, butts and tips trimmed squarely before treat- 

 ment, and in case piling has been stored in sea water, barnacles or 

 other similar forms of sea life shall be removed. Piling showing any 

 attack of insects or marine borers will not be accepted. 



Sapwood Requirements. Only such piling will be accepted for 

 treatment as conforms with the following minimum sap wood require- 

 ments : 



1. For a specified absorption ranging from twelve (12) pounds 

 to fourteen (14) pounds of creosote oil per cubic foot of timber, the 

 sapwood shall not be at any point less than one (1) inch in depth. 



2. For a specified absorption of sixteen (16) pounds of creosote 

 oil per cubic foot of timber, the sapwood shall not be at any point less 

 than one and one-quarter (l a /4 ) inches in depth. 



EXCEPT THAT 



3. Piling which does not meet the sapwood requirements specified 

 above will be accepted when treated separately, provided that the creo- 

 soting company will in each case guarantee the minimum penetration 

 of creosote oil specified. 



Sizes. Shall be as specified by the purchaser. For information, 

 the following appropriate size combinations of length and butt and tip 

 diameters are listed by groups, of which the group to be selected will 

 depend upon the class of structure desired and the load for which it is 

 designed: 



GROUP "A' 



Minimum Diameter Minimum Diameter 



Lengths Butts Tips 



Up to 49' inclusive 12" 8" 



50' to 64' inclusive 13" 8" 



65' to 74' inclusive 14" 8" 



75' to 100' inclusive 16" 8" 



101' and up 16" 7" 



