waratah HTH624C, Operator'S Manual

Page: 44 / 87

Operation—Thinning Techniques
RR71361,00000F2 -19-18NOV08-1/1
Plantation Out Row—Cut To Length at Stump
Falling in thinnings, requires the harvester head to be
placed approximately 2 meters (7 ft) up the tree and then
feed down the stem. This will assist with the delimbing
and create a clear area for the harvester head to grip
when felling. This is the purpose of the arms on a
HTH624C harvester.
In order to gain the maximum merchantable volume and
reduce bark damage to remaining trees, different methods
are used, cut to length or full length, within the stand.
A path of stems approximately 4 meters (13 ft) wide is
felled to allow access to both the harvester head and the
forwarder. While this path is being harvested stems both
sides of the path are harvested and processed. Stems are
stacked either side ready to be uplifted by the forwarder.
•
Decide where to stack the stems.
First fell the tree on the left and process it to the left
or right. Process the stems over the path and lay the
stems on the opposite side. This method results in the
harvesting slash being left on the path, thus providing a
better load bearing surface for both carrier and forwarder
and a clean area for the stacks.
With this system, trees can be felled consecutively left
and right to reduce the amount of harvester movement,
ensuring stacks are positioned so that the forwarder can
easily uplift.
When stacking, use separate piles to identify grades
which will assist the uplift by the forwarder.
Color marking enhances this operation and reduces the
area required for stock piling.
TX1050359
—UN—29OCT08
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