Although called various names, grapple trucks or log loaders are trucks that have a clamping tool that can effectively grab whole pieces of timber and load them to be delivered to a processing plant. The type of grapple that is commonly used for log loading is the claw-type clamp, which resembles forks that bypass each other when used to pick up the wood. This device is usually mounted to hydraulic knuckle booms to perform the job efficiently. In this way, it becomes a multi-tasking machine that can handle timber at most distances within reach. Just like any other forestry equipment, these trucks must follow certain steps when being used in the forest.

Operational Steps:

1. Prior to Job

• Before hauling timber in a logging truck, the owner’s manual should be read and understanding should be complete regarding the safe and proper use of the grapple attachment.

• Operators should be well-trained and appropriately licensed to handle these vehicles.

• All handlers should be aware of the lifting capacity of the vehicle.

2. Prior Inspection

• Before turning on the machine, the job site should be closely examined to ensure that there are no workers near the area where the logs will be moved.

• Ensure that the vehicle operator has good visibility of the landing and deck area.

• Confirm that all hydraulic rigs are in place to stabilize the equipment so that there is a strong foundation during the log loading.

• Trees that block the movement of the grapple should be removed when loading timber.

• Avoid usage near power lines. A 100-foot parameter should be used to avoid electrocution hazards.

3. Grasping

• Be sure that the hydraulic grapple grabs the logs completely to avoid dropping. Pinching is not recommended in moving logs as this creates a high risk for side-slipping.

4. Loading

• Do not load the trailer if the driver is inside the unit. The transport truck driver should not remain in the cab if the unit has no cab guard.

• No workers should be on the blind side or near the log loader while it is being operated.

• No cut trees should be moved near or over another pile of cut trees in order to avoid unexpected movement.

• The gripped logs should be slowly moved onto the trailer bed until the vehicle is fully loaded with the lumber to be transported to its final destination.

• Transport trailers should not be overloaded. Loaded lumber should be uniform in height and fastened in place to avoid shifting during transit that could lead to transport vehicle tip-over.

5. After Completion

• When the job is complete and the vehicle is no longer in operation, the knuckle boom should be folded and put back into place to prevent unnecessary accidents.

The technological advancement of hydraulic knuckle booms has paved the way to the versatility of grapple trucks. This modern technology is very effective and productive not only in bulk trash collection, landscaping and excavation but also in log lifting operations. Similar to other forestry trucks, grapple trucks have their own method of functioning and accompanying safety warnings. The information provided above should supply enough information for an overall view of how these vehicles work in the forest and the necessary safety measures to consider when operating these machines!