Periodical Literature. 6oi 



The species of timbers and sizes used for 



Piling Used piling in various parts are given as follows 



in by the Lumber Trade Journal. 



Various Canada — Vancouver. Douglas Fir. Piles 



Countries. 30 to 40 ft. long are 12 to 14" diam., 5 feet 



from butt ; other lengths are In proportion ; 



all taper to 8" small end. Untreated they last in salt w^ater i to 



3 years ; one instance cited in which they fell in 1 1 months. 



Creosoted they last from 10 to 18 years. Sometnnes they are 



wrapped with chemically treated paper or with sheet copper. 



Australian "turpentine" (Symcarpia laurifolia) piles have less 



taper. They last untreated 20 years or more; one case cited in 



which piles removed after 18 years service still in good condition. 



Cost is high, 60c lineal foot, which is 20 to 30c more than treated 



Douglas Fir and 50c more than untreated. 



Mcxica — Mansanillo. Douglas Fir and Coquito Palm are used 

 in lengths up to icx) ft. with 24" butts and 12" points. Creosoted 

 under pressure, if full penetration, they last 3 to 4 years : painted 

 with carbolineum, two years; and if sheathed with felt and sheet 

 copper they last as long as covering is intact. 



Mexico — Tampico. Texas Pine 10 to 30 ft. long by 10 to 12" 

 diameter is used mostly. Formerly were used with bark on, but 

 now creosoted under pressure. Native palms have been in use 

 10 years and appear to be good for that much longer. Chijol 

 is said to last 40 years and still be in good condition but gen- 

 erally the poles are too short for use. Teredo is said to be 

 the only borer encountered in this section. 



Cuba — Habana. Woods in use for piling are Jucaro, Jiqui, 

 Mahogany, Majagua, Cuban Pine and American spruce and pine. 

 The first two are most popular. Specifications call for 12" to 

 14" diam. by 30 ft. or longer, usually free of bark. Jucaro will 

 last about 15 years vmtreated, and Jiqui, Mahogany and Majugua 

 about 12 years ; American pine not more than 4 or 5 years un- 

 treated and Cuban and native pines less than 3 years. Native 

 woods are not treated; American pine when used is generally 

 given 22 lbs. of creosote oil per cu. ft. Native timbers are some- 

 times given a coating of re-enforced concrete or cement 1/4 to 1/2 

 inch in thickness. Creosoted piles have not proven satisfactory; 

 in at least one instance gave out in 3 years, but in another were 

 in good condition after 5 years. Cement coating has not yet 



