Standard rectangular/strip vs. Tapered/ triangular hinge when sideLean

[TheTreeSpyder]

When facing and backcutting round connection to more linear hinge connection,
Generic/even across/rectangular/strip or fat 1 side/offset/triangular/tapered hinge?

If Center of Gravity(CoG)/lean same, so gives same forward pull
>> all hinge front compressed pivots at same point = fold at same forward resistance (strength)
(just less than forward leveraged load of total weight X length from hinge pivot to CoG)
Calc also same side loading in each, but may have different resistances/control against side loading

 

[TheTreeSpyder]

Free Lynx:
Classic: The Fundamentals of General Tree Work by G.F. Beranek /hosted by Educated Climber.com
Great: Tree_Felling_Presentation.pdf
Article: Tree Care Industry: Greater Falling Accuracy Using the Tapered Hinge
Mini course: COURSE IN REDUCED-IMPACT LOGGING: Chainsaw Use, Safety Practices & Directional Tree Felling Techniques
YouTube: Tree Felling Don't Become a Statistic (~8.30 in felling cuts)
.
The original felling specific classic >>Professional Timber Falling : A Procedural Approach by D.Douglas Dent still must be purchased
(about best $30 might spend this yr.)
.
i invite to take Tapered Hinge to felling and beyond , to climbing and bucking cuts, as better science against side forces,
>>as re-verifed in the different types and angles of wider variety of usages in climbing cutting/rigging and tree bucking!

 

[WI_Hedgehog]

Classic: The Fundamentals of General Tree Work by G.F. Beranek /hosted by Educated Climber.com

Just bought this...what a load of awesome information! Thank you for recommending the book! Printed it, hole-punched, and in a 3-ring binder.

 

[TheTreeSpyder]

YW!
Look at 1 man chainsaw as 50's invention, mainstreaming into 60's, about 70's is when Beranek (and Dent) put out their books, that are still unsurpassed as standing classics of working trees.
.
Here is thee still 7foot in diameter at 150ft up poster that Gerald Beranek did (he is the one with the brown cast on right foot from crane outrigger set down on it weeks before). Good thing it slowed him down long enough for the camera to catch! He is using a classic Stihl 090 , with chains binding to avoid splitting high and low over the cut made on old time springboards, while also tied in.

.
Whenever i started even feeling like i was getting good, would stand humbled in wonder in front of this poster.
In time, climber trainees so full of them selves bragging would be pit against the poster.
They ain't humble enough to shut up about themselves(most did), they ain't worth keeping/they will hurt themselves or others!
.
In later years here is the author again, with best bud the recently late, great Master Blaster that used to post here when this place started(wearing one of his 'scuse me while i touch the sky' shirts he sold of him topping tree)!

Seems mr.Beranek still has a problem with the right rear paw!
If you gonna learn, might as well be from the bestes!

 

[TheTreeSpyder]

Besides properly ballasting against sideLean with Tapered Hinge so that delivers most squarely to target.>> this can cause a Deadly
Should make facecuts squarely meet like fine carpenter.
Specifically bypassing the horizontal cut past the slanted cut gives a face within a face
>> that the inner face closes first and can take control
This can cause a Deadly Dutchman, especially if tree force rushing forward like a freight train of force hitting this early close
>>especially full face across w/o relief path to either side as not closed (Step Dutchman)
>>This is like a single kerf cut made in a small top to close early and hop across fence
>>or 'snap cut' to small horizontal trying to get to drop straight down
BUT at full tree force of high loaded leverage, totally off the scale of powerband of what the simple maneuver can safely negotiate.