I tried to point that out years ago to Burnham and others.. their belief was that the coos bay reduced barber chair only becasue it allowed the sawer to race through to holding strap between the two side cuts and that racing, meaning the speed of the cut, was the only factor that helped reduce...
did you watch the third one???
He suggests cutting the notch on front leaners only 1/6th diameter, the using a plunge cut... that's only necessary when there is so much front lean that the bar might get pinched just making the notch, which is the exception rather than the rule.. The plunge cut...
The split that causes a barber chair ALWAYS starts at the end of the back cut... The shear forces between tension and compression wood can open up a split on a heavy horizontal limb, but have nothing to do with a barber chair.
I asked the same question on FB and some guys were saying the same...
Someone on Treebuzz started a thread called "Why 1/3 notch depth?" ... Why 1/3 notch depth? - https://www.treebuzz.com/forum/threads/why-1-3-notch-depth.46614/
I have said for years that is one of the rules that has largely gone unquestioned and unexamined in the industry (along with the...
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