Climb for Research

[treeseer]

http://www.isa-arbor.com/resources/RFP-TreeBiomechanicsWeek-climbers.pdf

More details on ISA website. Oughta be fun.

 

[jomoco]

http://www.isa-arbor.com/resources/RFP-TreeBiomechanicsWeek-climbers.pdf

More details on ISA website. Oughta be fun.

OK Guy, assuming that you'll be attending this bio-mechanics workshop, I'd like to respectfully request that you ask the experts there an unusual question that has been floating around in my mind now for decades.

Has it yet been scientifically proven that a healthy lateral branch has more structural strength if pulled vertically from below it, or vertically from above it?

It's my belief that a healthy lateral is more easily broken or fractured applying an upward force to it than a downward force. And I base this knowledge from hands on experience ripping smaller healthy branches off leaders I'm climbing by hand.

Can this theory of gravity oriented wood strength be proven by taking two freshly cut branches of the same species and dimensions, and breaking them on a press, one in the same orientation it had in the tree, and the other in the opposite orientation, upside down?

Or has this been known already for decades, and I'm just ignorant of it?

Thanks Guy, a very interesting thread to me as an ole timer.

jomoco

 

[treeseer]

Jon, I agree. I've experienced the same by hand, and read Shigo noting the same.

re attending; don't assume anything; i just applied but do not knwo if i will go. why don't you apply, and ask those folks yourself/\?