I failed

[Naturarbo]

On last job
Top rigging anchor, redirect to a lower point, then redirect to a higher point...cut a piece and I believed that 3 rigging points would take all the momentum.
Next piece cames down and the all tree shakes hard.
The redirect to a higher point was the mistake or...???
Later that day I found out a bit of the tree past and major roots have been cut to build garden or was this the reason for the reaction?

 

[flushcut]

That is very possible. Or the piece had too much momentum/ swing. Tag lines or a butt tie to help control the swing. Or if the rig point is high enough and strong enough something like a GRCS can be used to negate the negative drop almost making the piece come off of the cut static.

 

[Mick!]

I think you’ll be getting double the force on the lowest redirect if I understand you correctly.

 

[SeanKroll]

A drawing would help.

 

[Naturarbo]

That is very possible. Or the piece had too much momentum/ swing. Tag lines or a butt tie to help control the swing. Or if the rig point is high enough and strong enough something like a GRCS can be used to negate the negative drop almost making the piece come off of the cut static.

Lasr anchor was above piece.

 

[Naturarbo]

I think you’ll be getting double the force on the lowest redirect if I understand you correctly.

I believe that is what happened.

 

[friedrich]

i tend to view it as a better/stronger rigging system when i shake the whole tree opposed to just a portion of it. sometimes i do what i think you describe to load two high anchorpoints in compression rather than pulling them together.

cut roots is obviously not very good.