366 



LOGGING 



to be done and the physical conditions that must be met. Fig. 

 no shows a sorting gap on the St. John River near Fredericton, 

 New Brunswick. This consists of two block piers 50 feet apart, 

 behind which are rafts built of five logs each, so arranged that 

 five gaps, each 22 feet wide, are formed on each side. The 

 space between opposite rafts is spanned by 4-foot plank bridges 

 on which the sorters stand. The division boom shown extends 

 downstream for 2000 feet to sheer booms which deflect the logs 

 to the American and Canadian sides. Seventy-five men are 

 employed at this gap and during the season 150,000,000 feet of 

 logs are handled. 



CANADIAN SIDE OF SORTING GAP 



f— 



^ 



V^ 



fj>VH 



SJ>^-^ 





y^- 



Divisioa Boom 





^ - C3 V O - ^ ^ -."C>, ^ 



/ AMERICAN SIDE OF^SORTING G^P ~^ 



-^ -v^ ^ -. ^ ■* 



Fig. 1 10. — A Sorting CJap on the St. John River near Fredericton. New Brunswick. 



A sorting device used in the Appalachian region is shown in 

 Fig. Ill, a. 



This consists of a sheer boom {A) moored to a tree on the 

 bank and braced by a secondary boom at {B) . The boom (/I ) is 

 held in place in the stream by cables attached as shown in Fig. 

 111,6. The lower end of the boom is broken at (C) and may be 

 opened to allow logs and driftwood to pass downstream. A 

 sorting platform (Z)), with braces {E) and (F), is provided on 

 which the workers stand and shunt the logs to be stored into 

 the pocket (G). The remainder pass downstream to other 

 storage pockets or to points below. The boom {H) is elevated 

 by means of a built-up raft (Fig. 1 1 1 , c) to allow logs to pass 

 underneath into the storage pocket. 



