238 



LOGGING 



Curves on slides must be laid out with reference to the length 

 of material to be handled. Sharp curves are always undesirable 

 and especially so on steep pitches because the wear is excessive 

 and logs are likely to jump out of the slide. 



It is necessary on 2 -pole and 3 -pole slides to elevate the outer 

 sKde timber, the amount of elevation depending on the degree 

 of curvature, the grade and the character of material that is 

 being transported. A radius less than 200 feet is not desirable 

 for anv form of slide. 



pm^ii'W'^^^^:-] 



LJ\- 



Fig. 69. — A Turn of Logs ready to move along a Trailing Slide. 



OPERATION 



Running slides are more expensive to operate than trailing 

 slides because of the greater construction and maintenance ex- 

 pense, and the added cost of returning to the slide the logs 

 which have jumped out of it. 



