Tongue and groove scarf or notch

[Colin]

Now this technique, along with a tapered hinge, and offset gun would have to be the ultimate for side weighted or side leaners.

This is a demo of it, it worked well, perhaps I could have made the step a little smaller but you get the idea.

12mb and 2.28mins wmv

www.palmtreeservices.com.au/video/tongueandgroove.wmv

 

[Pete_in_Tassie]

Nice clear pics of the technique Ekka however I see it as an excellent method for felling small diameter trees with no chance of running out of room driving the wedge. I've used it a lot for tall skinny trees with a bit of backward lean. I would have no great faith in it helping with side leaners because the leverage of the tree over the "tongue and groove" would be so enormous that it would have little chance of counteracting the lean. The way I see it the wedge needs to be central rather than off to one side and able to counteract a lean to some extent. I'd sooner have a central bit of my hinge missing if I thought the sitaution could cope with it than one end of the hinge cut out.
There is another falling technique which has a huge tongue and groove made in the trunk but even that one I think would be doubtful in terms of the resisting the forces of a big sideways lean.
Those videos are a great way for showing things Ekka! Much appreciated!
Pete

 

[rimu]

Thanks Ekka

This vid is great. Clear and concise. A useful technique for small trees.

Cheers

 

[Mahk_Adams]

Nice video Ekka.


Pete in Tassie wrote:

[ QUOTE ]
with no chance of running out of room driving the wedge.

[/ QUOTE ]


People should be aware that as the wedge is driven further into the tree the wedge creates lift not only on the back of the tree, but also on the hinge. I have never had it happen, but I've been told that the wedge could break the hinge by creating too much upward force on the hinge. If I think that there is any chance of this happening I simply widen the bore cut right at the hinge when I first bore through the tree.

For heavy or backward leaning trees, wedges can also be stacked by boring the appropriate number of 'slots' and then inserting wedges in the slots and driving the wedges in succession.

 

[allmark]

Nice shots Ekka it really shows the method clearly.

 

[hammer0419]

Very nice video. Thankyou..............