Table 33. Preservative retention for timber treatment (from AWPA C2 and C18) 











Retention by SPECIES (pcf) 





u 

 u. 



re o 

 o> — o 



C CO-h 



■h 3 e 



c 



h — I c 



<u re »- 



Xf « 



4J in +J 



3 « in 

 O O D 



V) u 2 



Western Larch 

 Interior Douglas |-'ir 

 Ponderosa Pine 

 Uedwood 

 Jack Pine 

 l.odgepole I'ine 

 White I'ine 

 Red I'ine 

 Sugar I'ine 



3 

 O 



(3 



5 



re 



Types of 

 Preservative 



o o 



Creosote 1 



Pentachlorophenol 



ACC, ACA, CCA 



CZC 



FCAP 



8.0 3 

 .43 

 .2S 3 

 .4S 3 

 .25 3 



8.0 3 

 .4 3 

 .2S 3 

 .45 3 

 .2S 3 



5.0 

 or 6.0" 



.25 

 or .3 U 



.25 



.45 

 .25 



6.0 

 .3 

 .25 

 .45 

 .25 



u o 



o - re 



4-> 4-) 



n c 

 s o 

 £ u- 



O --I 



t. -H 



U. O 



CO 



Creosote 1 



Pentachlorophenol 



ACC 



CCA or ACA 



10. O 5 



.s 5 



.5 5 

 .4 5 



10.0 

 .5 

 .5 

 .4 



6.0 

 or 7.0 1 * 



.3 

 or .35 1 * 



.5 



.4 



8.0 

 .4 

 .5 

 .4 



*•> 



a 



4-i 



C 



o 

 u 



N 

 01 



*-> 



3 

 U 



M 



to 



V, 0) 



re c 

 — i o 

 CM 

 CO 



Creosote 1 

 Pentachlorophenol 

 CCA or ACA 



12.0 

 .6 

 .6 



6 



6 



6 



■n 



o 



E 



to 



o 



To 

 c 



co 



Creosote 1 ! 2 

 CCA or ACA 



25. 2 ) 7 

 2.5 e 



25. 6 ' 7 

 2.5 6 i 8 



10.0 6 ! 7 

 MR6.8 



1 2 . 5 > 7 

 NR " 8 



re 

 2 



Creosote 1 

 CCA or ACA 



20.0 

 1,5 









includes creosote-coal tar. 



2 Creosote-coal tar not recommended for single treatment of these woods. 



3 In saltwater atmosphere, above splash zone, use retentions for "Freshwater 

 and Soil Contact." 



"•For members under 5 inches (13 cm) thick. 



5 In soil contact in saltwater splash zone or atmosphere, use retentions for 

 "Splash Zone." 



6 AWPA C2 lists treatments for these woods "Subject to Marine Borer Exposure," 

 but AWPA C18 does not recommend them for saltwater use. NR: Not recommended. 



7 Teredo is present with no to light limnoria activity. 



8 Limnoria activity is moderate to heavy but pholads are absent. 



9 Limnoria is present with teredo or pholads. 



255 



