238 LOGGING 
An average day's work for a pullboat crew is from fifty to 
seventy-five logs; the output is often less, however, because of 
cable breakage. 
Re-haul skidder. — The slack-rope system has been extensively 
introduced into the southern pine region in recent years to log 
timber standing on a bottom unfavorable for the use of animals, 
such as swampy areas; to log dense stands where the slash is 
hea\'y; and also to log open stands in which there is a heavy 
growth of underbrush. This method is most commonly used 
in the shortleaf pine region. One common type of re-haul skid- 
der, the Clyde, is self-propelling and is mounted on a special 
design of steel car. Heavy semi-rigid booms project from each 
end of the car and from the outer ends of these booms blocks are 
suspended through which run the various lines needed in the 
operation of the skidder. Some machines are designed to operate 
one line from each boom, while others are so equipped that two 
lines may be operated from each end of the skidder. In some 
cases, operators convert a four-line snaking system into a two- 
line re-haul by using one-half of the skidding lines for out-haul 
lines. Each set of lines requires two drums, one for the main 
skidding line and one for the out-haul, and if two lines are operated 
from each end, a double set of drums must be provided. In 
addition a drum for a straw line, one for a decking line and small 
drums or thimbles for tightening the boom stays are necessary. 
The capacity of the drum carrying the skidding line is about 1000 
feet of |-inch cable, and that of the out-haul drum, about 
2500 feet of f-inch cable. The straw line drum carries from 
2500 to 3000 feet of |-inch cable which is used in running 
out the out-haul line when logging is shifted from one run to 
another. The decking line is f-inch and about 150 feet long 
and is used to deck or pile the logs parallel to the railroad. One 
end of each boom stay is fastened to a stump or tree at one side 
of the track and passes through a block on the end of the boom 
and to a small drum on the machine, which is used to tighten 
the stay when it has been adjusted. 
Re-haul skidders do not have loading equipment and this 
work must be done at some later time by an independent load- 
ing unit. The usual skidding distance for machines of this 
type is from 600 to 800 feet. Railroads, therefore, are located 
approximately one-fourth of a mile apart. ' 
