Solid Wood Products 



2667 



35 

 30 

 25 



^ 15 



10 



5 







^ CREOSOTE 



g ZINC CHLORIDE 



■ untreated 



* i 5 



?^ ^1 ct 



Co Uj ^ 



^ Qi QQ 



^ 0. 





(i; Co 



Figure 22-55. — (Top) Service life of crossties of 15 species, untreated, zinc chloride- 

 treated, and creosoted. (Bottom) Relation of traffic to service life of creosoted cross- 

 ties. (Drawing after Bescher 1977.) 



