62 



GROUP "B" 



Minimum Diameter Minimum Diameter 

 Lengths Butts Tips 



Up to 60' inclusive 14" 9" 



61' to 80' inclusive 15" 8" 



81' to 100' inclusive 16" 8" 



101' and up 17" 7" 



No piling with butt diameter greater than twenty-two (22) inches 

 will be accepted unless otherwise stipulated. In determining the dia- 

 meter of a pile not having a circular cross section, the average of the 

 minimum and maximum measurements at that cross section shall be 

 taken. 



Air Seasoned Piling 



Piling stored on land and air seasoned shall in all particulars meet 

 the foregoing specification for green, freshly cut and water stored pil- 

 ing. Piling stored on land for air seasoning must be piled on skids or 

 other supports so as to keep the piling at least ten (10) inches above 

 the ground line, and each layer of piling shall be separated from the 

 other by strips not less than two (2) inches in trickness so as to permit 

 a free circulation of air. Piling stored in this manner will be con- 

 sidered thoroughly air seasoned when the moisture content of the piling 

 based on the even dry weight, has been reduced to twenty (20) per cent. 



Air seasoned piling with checks of such size as will impair the 

 strength and durability of the piling will not be accepted, regardless 

 of the fact that such checking has taken place naturally. 



Sawed Lumber and Timber 



Quality and Grade. The purchaser shall specifiy commercial grade 

 desired which shall conform to Grading Rules standard or currently 

 recognized in the production and marketing of the species of timber 

 or lumber involved, and to so grade after treatment. The standard 

 commercial grade usually specified for creosoting purposes is that 

 known as #1 Common Douglas Fir, in accordance with Domestic List 

 #1, edition of 1917, published by the Pacific Lumber Inspection Bu- 

 reau, Inc. 



PREPARATION FOR TREATMENT 

 Selecting Material for Loading Cylinder Charges 



Sawed, Lumber and Timber. Care must be taken to secure ma- 

 terial of approximately the same moisture content for each cylinder 

 charge; that is, green or freshly cut lumber and timber must not be 

 mixed with seasoned or partially seasoned material. 



Piling. As in the case of sawed lumber and timber, all piling to be 



