"For southern pine piles, it is concluded that: 



Dual treatment (ACA and creosote or CCA and creosote) or treat- 

 ment with ACA only are more deleterious to more mechanical proper- 

 ties than treatment with creosote (refer to Table 2)." 



Recommendations 



"It is recommended that: 



(a) In areas where piles are destroyed mainly by mechanical 

 means, creosote-treated piles should be considered. 



(b) In areas where piles are destroyed mainly by biological 

 attack and it is known that dual-treated piles will last suf- 

 ficiently longer than creosoted piles, the additional expense 

 will be justified. 



(c) Accurate records should be kept of randomly placed 

 pile treatments and of installation and removal dates so 

 that a better selection of treatments could be made." 



411 



