Improving the main trail
Quiz
Improving the main trail by digging. Choose the right statements.
- It is useful to remove major obstacles like stones or wood with the grapple.
- It is possible to use the grapple to dig up stumps out of the trail.
- Stumps and stones can be left on the trail because the boggie axis
can compensate the unevenness.
Adding branches to improve the trail surface. Select the right statements!
- Birch branches are not good for driving on because they are not very tough and suitable.
- Pine branches are not as good; Branches from older pine trees are straggly and easily broken.
- Spruce branches are the best choise for the trail surface.
Building a corduroy road. Mark the right statements!
- If your trail has short sections with very poor carrying capability, it may be necessary to ram som logs with the grapple in the trail to drive on it.
- Pulplogs which are damaged by wheels from forestry machines could be sold as normal, because pulplogs are cipped anyway.
- All wood which is damaged by wheels of foresty machines could be rejected by the scaler.
Wood from a corduroy road...Mark the right statements!
- There are no scaling regulations which dictate, that wood damaged by the passage of forestry machines should not be placed in a sawlog pile
- Wood from corduroy roads is suitable for processing with chippers because they are now very contaminated by mineral soil.
- It is the best alternative to leav wood from corduroy roads in the forest.
Build a corduroy bridge - in front of the machine
- Place branches on the bridge surface. They will keep the wood in space, and stop it rolling.
- It ist not necessary to level the ground before placing the wood.
- Use spruce branches and tops to bind the bridge on the ground.
Logs in a corduroy road....Mark the right statements!
- Corduroy wood should never lie at an angle.
- It is better when the wood from the corduroy road lies in a shallow angle as the carrying capacity from the subsoil is much higher.
- It is important to build a corduroy bridge befor the ruts get too deep.
The alongsside method. Mark the right statements!
- Sometimes it is the most rational way to improve the carrying capacity of soft soil by laying down wood parallel with the trail.
- When wood lies parallel to the trail it uses less than a quarter of the volume of wood required to build a corduroy bridge.
- On larger flat surfaces with poor carrying capacity, it can be very helpful to lay logs down parallel with the trail to serve as a bridge.
The alongside - method...
- It is impossible to combine the alongside and the corduroy bridge method because there is a great risk that the wood beginns to roll away.
- Avoid driving on soil from which stumps have been removed as the risk of getting stucked is very high.
- The directions of the logs should alternate, i.e. the butt of every other log shoulf point towards each end of the bridge.