Barber Chair Take Away...

[Dale Hatfield]

Length:  minimum of 80% of dbh (says dbh but suspect it is diameter of tree at cut).
Width: maximum of 10% of dbh.

NO DBH is correct.Your Crib sheet is correct.
Length is 80%of DBH. 10%Hinge Thickness.
Remembers these are guidlines a place to start.
In some trees thats going too much thickness. Depends on species. 10% would be the max ,with most hardwood trees taking less hing thickness than 10%. Hickory being a prime example
The hinge length is what helps overcome side weight and lean. Short on length and the tree will fall  but towards the heavy side .

After you have cut the tree down . Have a look at the stump/Hinge the fibers at the back of the hinge break and the ones at the front bend. No that doesnt mean that you can use 1/4 inch hinge. Because it wont support the tree( pinched saw) But as the tree starts to go in your chosen direction  the back fibers break till it gets to the front and these bend.
Dale

[beenthere]

Thanks for clearing that up Dale. (dbh being diameter breast height).  I hadn't noticed it until I was copying into the message.

And I agree, they are guidelines, as each tree needs to have it's own plan....

[rebocardo]

> Does it leak now?

Only when it rains  ;)

[Kevin]

This is a picture showing the wood fibers pulled from the tree and stump.