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ArtB

ArboristSite Guru
Joined
Apr 7, 2003
Messages
610
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474
Location
renton wa
Posted last year asking how much torque it would take to pull over a 150 ft, 44' DBH black cottonwood.

Well, ti took about 70 foot up cable attach, 2ea 5/8" IPS WR to 20T block and double 1/2" WR, then another 4T block to 3/8" WR to 10K# winch tied to a 400 YO DF stump, a few million foot pounds.

Had the tree side cabled with 1/2" WR, but with an intermediate 10,000# trailer pulling the side cable down

Anyway, the root ball wanted to go a little different direction, about 5 degrees off, and dragge the trailer sideways some, resulting in the part of the tree about 80 ft up hitting my backhoe

Only damage to backhoe was crushed FOPS (nobody nearby, winch controlled electrically from 200 ft away.

Drove the tires into the dirt up to the axles,
Rebult the FOPS with 4 ea 1/4" web 4x8 channel, added 1500 # of steel for new canopy.
 
THERE IS SOMETHING TO BE SAID FOR PROPER FIGURING! gUESS HE DIDN'T FIGURE PROPERLY sOUNDS LIKE TO ME HE HAD A HOLE LOT OF SPAGETTI STRUNG OUT. uSE LEVERAGE TO YOUR ADVANTAGE NEXT TIME.
 
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