TIMBER SLIDES AND CHUTES 23 1 



of this character are desirable on side-hills, where there is a 

 tendency for the logs to leave an earth trail. 



Timber Slides. — Timber slides consist of a trough or chute 

 made of round or sawed timbers supported on cross-skids placed 

 at frequent intervals. On low grades where logs will not run by 

 gravity it is necessary to clear out a right-of-way 8 or 10 feet 

 wide which serves both for the slide and as a pathway for the 

 animals which handle the tow of logs. Where the grade is 



Fig. 63. — View down a Timber Slide. Idaho. 



sufficient to cause the logs to run by gravity, a right-of-way 4 

 feet wide is ample. 



A common form of round timber slide consists of two parallel 

 timbers supported on cross-skids placed from 8 to 15 feet apart. 

 The timbers are from 9 inches to 18 inches in diameter and from 

 20 feet to 60 feet long and are cut from trees having a minimum 

 taper. Either a log 6 inches or 8 inches in diameter with a 

 hewed face or a 4-inch by 8-inch plank is often placed between 

 the two slide timbers and fastened to the cross-skids. The poles 

 are placed from 4 inches to 6 inches apart at their nearest point 



