LOGGING IN THE DOUGLAS FIR REGION. 
117 
METHOD. 
The method of high-lead yarding is illustrated by figure 34. A 
suitable tree conveniently located near the track is used as a spar 
tree. This tree, with the top cut off at from 120 to 200 feet from the 
ground, is guyed with from six to nine lines to give it rigidity. In 
the case of high spar trees there are usually six guys from the top 
and three from a point near the middle. If a double-line system 
of loading is used, two additional guys are necessary. A high-lead 
block, with a sheave from 24 to 36 inches in diameter, is hung near 
36"HICH t£AO BUDS* 
t/j"j/ttfL£t r*fioi»t enc<»£ 
Fig. 34. — Location of equipment and improvements in high-lead yarding. 
the top of the spar tree below the guy-line fastenings. The hauling 
line is passed from the drum of the engine to and through this 
block, and on and out to the logs to be yarded, the power being 
furnished by the trip line, as in the case of ground yarding. As a 
rule, no landings are built ; but, owing to the large output secured, 
a loading engine in addition to the yarding engine is necessary in 
all cases. The yarding engine may be set at the base of the tree, or 
from 150 to 250 feet from it. In some cases the yarding and load-* 
ing engines are mounted on an ordinary flat car or a special steel 
car with swivel trucks. (See guy-line loading under "Loading.") 
