Time is a very important item in loading and unloading. Usually the most
time is consumed in loading, for which reason any improvement that will
reduce the time taken to load will greatly increase the efficiency of
the operation. With the proper unloading devices, the truck may be
unloaded in the time required to knock down the chock blocks.
The following table is a record kept for one day of the actual time
taken by a truck at each step in the hauling of logs at one operation.
However, it is possible to give only arbitrary figures to fit the
particular operation of which they are taken. No average figures can be
given that fit all conditions.
DONKEY ENGINE DUMP AT MILL
Time Time Unload- Time
Arrive Loading Leave Down Arrive ing Leave Up Scale
A.M.
7:15 10 Min. 7:25 20 Min. 7:45 25 Min. 8:10 20 Min. 2592
8:30 5 Min. 8:35 27 Min. 8:57 13 Min. 9:10 20 Min. 2092
9:30 12 Min. 9:42 21 Min. 10:03 7 Min. 10:10 20 Min. 1908
10:30 12 Min. 10:42 33 Min. 11:15 30 Min. 11:45 20 Min. 3074
P.M.
12:05 10 Min. 12:15 35 Min. 12:50 17 Min. 1:07 20 Min. 2542
1:27 15 Min. 1:42 18 Min. 2:00 27 Min. 2:27 20 Min. 1828
2:47 8 Min. 2:55 21 Min. 3:16 8 Min. 3:24 20 Min. 1689
3:44 11 Min. 3:55 23 Min. 4:18 9 Min. 4:27 20 Min. 2407
4:47 14 Min. 5:01 26 Min. 5:27 12 Min. 5:39 20 Min. 2558
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Total 20690
Length of haul 5.9 miles round trip.
Amount of gasoline, 15 gallons.
The above figures were taken several years ago when the facilities for
unloading were slower than the present day methods, which accounts for
the excessive length of time taken to unload.[8]
[8] The writer is indebted to Mr. George Gunn, Jr., for these figures.
The unloading of a truck is a time when a little care taken will save
considerable expense for repairs. Such a method as the parbuckling
system should be used by companies with sufficient stumpage to warrant
the expense of the extra donkey, to prevent the top logs from dropping
to the log bunks, thereby saving the cost of repairing broken springs
and bearings.