Improving the main trail

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
The following points should be considered if you need to place branches in ruts or small cavities on the trail

- When you have completely filled the loading space with , fill the grapple with branches, preferably branches.

- Shake the bundle as much as you can so that the loose falls off.

- Place the grapple on top of the load, but do not it.

- Drive towards the landing and place the near the spot where you plan to use them.

- With the machine empty, you will find it much easier to place the exactly where they are needed. Use the to place the branches in the rut or cavity.

Sometimes the best solution is to collect a full load of to be used on a section of the trail. If the trail capacity, needs to be increased substantially, tops should be laid in the bottom of the , with branches above them.


Placing wood in the ruts

Moving across areas with poor carrying often creates deep ruts. In many cases, this does not necessitate the construction of a bridge. However, if you feel that the are getting too deep and you are afraid of getting stuck, you will have to take some action. Under such circumstances, it can be helpful to place in the ; fuel wood is often suitable for this purpose. Once the has been placed, it is advisable to place over it to bind the wood together. Wood placed in the during winter conditions may together and cannot be recovered after use.

Use the right kind of wood when building a corduroy bridge

Because the used in log causeways is generally rendered unfit for industrial use, the least valuable wood should be used in their construction, as rot-damaged pulpwood that has been sorted out. As a last option use , but not the most valuable logs.



Dismantling the corduroy bridge

It is normally easy to recover the used in a corduroy bridge. There are two ways of doing this: one can either pick up logs directly in of the forwarder and move across the bridge, or use the to pick up logs immediately behind the wheels of the wagon and move across the bridge. The former method is limited because it is difficult to move in reverse with a loaded machine; the latter is challenging because it can be difficult to get a clear view of the log that is to be up. Corduroy bridges should therefore always be in daylight.



Building a corduroy bridge using the harvester

It is often preferable to build with the harvester if there are sufficient trees nearby. If there are too few near the planned bridge, the harvester should consider the scope for using trees that are slightly further away. If this is viable, the trees should be felled and fed towards the location of the planned bridge, after which construction can begin.

Building a corduroy bridge using a harvester:
- If one of the has valuable butt log, try to cut it off and avoid using it for building.

- Suitable should be felled and processed; the tops should be set aside. If the bridge will have to support a large , the logs should have a top diameter of at least 14cm.

- Place the bridge logs perpendicular to the direction. The orientations should alternate.

- Before driving on the bridge´s surface, you should place the “long top section” and any available on top of the bridge logs. This will the logs from stud damage.

- Be sure to properly anchor the bridge to the ground using and branches.
As soon as possible, the forwarder should add more tops and branches on the bridge, to protect wood from .