kerf cut

[Alex]

curf cuts good for stopping sap wood tear out or wood pull out from buttrests. well worth it in a tree depening on what your cuting and size and wait of bow or section.

 

will letter box a felling cut when felling a pole, keeps control but reduce pull needed, as two 2" thick hinges is always better than a long thin hinge.

[bill]

im talking about heavish stems that have been stripped. cutting the middle of the hinge out instead of making the hinge really thin.

[TreeSpyder]

Center punching hinge through face (or same missing in rot) is supposed to take out the stiffer area/ leave the younger/springier outside of hinge to flex. This outside area will then be thicker too.

 

Because the tree will still weigh same and be at same angle; therefore will start falling at the same hinge strength. Less noticeable an effect on tapered agaisnt side lean

 

This thicker hinge will also have more side to side control/have more power at the leveraged outer reaches.

 

Soren Ericson(sp?) and others have also used this technique for preserving more wood/less splintering at the fat/money end of the felled timber.

 

Kerfing across full length is snap cut; across full facing is similair/ both giving early close. Also risking Barberchair in full length/weight loads.

 

Kerfing 1 side of face, offers the other side still open as relief, and thus far less risk. Don on the control side/away from side lean; gives nominal effect; as the weight isn't slamming that side close for the responding effect. Done on lean (or down side in horizontal limb in climbing); gives harder close on the lean side. this gives a responding push over(or up). Seeing as the control side is still open; it is pulling at the same time. Between the 2 we have a push on one oend of the lever/hinge; and a pull on the opposite end/in opposite direction; for more of a tourqued adjustmeant i think. More of what Dent's hinging bible refers to as a swing dutchman i believe.

 

This is the outer edge/ tricky stuff; especially in full size felling. i prefer it in rigging and limbing. These trix can also be used in bucking quiet well. As in:

 

http://www.mytreelessons.com/Dutch Push in 1 side of Face

 

 

 

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