112 



Treatment of Air Seasoned Piling 



In the treatment of air seasoned piling, where artificial seasoning is unnecessary, 

 the piling ma>- he held in hot oil at a temperature of 180° to 190° F., until such time 

 as it has been heated sufficiently to permit impregnation without the use of excessive 

 pressures. This having been accomplished, the reciuired amount of creosote oil may 

 then be injected as in the foregoing case of green or water stored piling, and upon 

 being removed from the treating cyhnder, under similar conditions, this piling shall 

 stand the same detailed inspection. 



Fig. 41. (1) Section ol new cruosotcd piles delnered on .San Francisco Bay, 1921, showing uneven 

 penetration of creosote. 

 (2) Attack on pile by Liiiiiwria and Bankia, made possible by thin creosote penetration. 



