Skeans1
Platinum Member
The stump has to be higher because you have to get your saw up under the cut. It is used in the west because most trees are on the sides of hills, and as a rule they fell their trees down hill, or have significant root swell.
There is no real need to use the Humbolt Notch here because we do not fell trees on steep ground as often, nor is there any savings. Here, we have to have trim allowance" on logs anyway, which is at least 4 inches, but most loggers make it 6 inches just to be safe. You never get cut on a butt cut log because of the notch, so why make life harder?
The Humbolt Notch can be modified so it is the same as the Open-Face Notch, just upside down, but it is harder to make since your making the slope cut of the notch upside down.
Interestingly, I grew up with the conventional notch, became a certified logger, and was forced to adopt the open-face notch...as I should have. However, I never quite got used to it. To this day my method is 1/2 conventional, and 1/2 open-faced. Basically I make a really deep open-face notch. It should only be 10% the diameter of the tree, but I make mine about 30%, so wayyyyy deep. There are worse ways to cut wood though so it does not bother me.
The biggest reason it’s used out here all the waste is left on the stump as well as for safety it’s less likely to come back at you. To trim cut 40’s or 36’s all day depending on the species I can have trims from a 10” all the way to 2’. A humboldt is an easy cut to do once you dawg in from your sight cut you can rock the saw on the outside dawg and hit the cut every time. Have you had the enjoyment of taking a 5’ face out before? If not that’s a good reason to do a humboldt the face slides right out so you don’t have to break your back trying to shove around the whole thing or blocks. To your certification I’m a certified logger as well out in the PNW we were always taught a 1/3 to 1/2 diameter for depth it really helps for wedging as well using jacks.